diff --git a/addons/shopro/console/PartnerClean.php b/addons/shopro/console/PartnerClean.php
index 4f0f4e1..cdc2182 100644
--- a/addons/shopro/console/PartnerClean.php
+++ b/addons/shopro/console/PartnerClean.php
@@ -161,7 +161,7 @@ class PartnerClean extends Command
         $rateService = new \addons\shopro\service\partner\RateService();
         $resetRate = $rateService->currentRate();
         $resetN = $rateService->countN();
-        $formattedRate = number_format($resetRate, 8, '.', '');
+        $formattedRate = \addons\shopro\service\partner\IdentityService::formatRate($resetRate);
 
         $output->writeln("\n========================================================");
         $output->writeln("  重置后指标核对:");
diff --git a/addons/shopro/service/partner/DailySettleService.php b/addons/shopro/service/partner/DailySettleService.php
index 9e11457..124c26b 100644
--- a/addons/shopro/service/partner/DailySettleService.php
+++ b/addons/shopro/service/partner/DailySettleService.php
@@ -274,7 +274,7 @@ class DailySettleService
             'order_count' => $orderCount,
             'order_count_n' => $orderCountN,
             'gmv' => number_format($gmv, 2, '.', ''),
-            'rate' => number_format($rate, 8, '.', ''),
+            'rate' => IdentityService::formatRate($rate),
             'madow' => [
                 'pool' => IdentityService::formatMadow($madowPool),
                 'user_count' => $tasterCount,
diff --git a/addons/shopro/service/partner/IdentityService.php b/addons/shopro/service/partner/IdentityService.php
index 139f132..0d5d4bf 100644
--- a/addons/shopro/service/partner/IdentityService.php
+++ b/addons/shopro/service/partner/IdentityService.php
@@ -97,7 +97,14 @@ class IdentityService
         if ($value === null || $value === '') {
             $value = PartnerConfig::get('partner_madow_base_rate', '0.00000075');
         }
-        return number_format((float) $value, 8, '.', '');
+        $floatVal = (float) $value;
+        if ($floatVal <= 0) {
+            return '0';
+        }
+        // 高精度十进制展开，防止科学计数法 (如 7.15E-7) 并避免微小汇率被 8 位截断四舍五入
+        $formatted = number_format($floatVal, 12, '.', '');
+        $trimmed = rtrim(rtrim($formatted, '0'), '.');
+        return $trimmed !== '' ? $trimmed : '0';
     }
 
     public static function attachAgent($agent, $rate = null)
diff --git a/addons/shopro/service/partner/RateService.php b/addons/shopro/service/partner/RateService.php
index 6378b6d..17ef56a 100644
--- a/addons/shopro/service/partner/RateService.php
+++ b/addons/shopro/service/partner/RateService.php
@@ -46,7 +46,7 @@ class RateService
         // 关键防坑：PHP 8.0+ 下小于 0.0001 的浮点数转为 string 时会自动变成科学计数法 (如 "7.5E-7")
         // 传给 bcmul() 会直接抛出 Fatal error: Argument #1 ($num1) is not well-formed
         // 必须使用 number_format 格式化为无科学计数法的高精度十进制字符串
-        $baseStr = number_format($base, 10, '.', '');
+        $baseStr = number_format($base, 12, '.', '');
 
         $step = intval(PartnerConfig::get('partner_madow_step_orders', 1));
         $step = $step > 0 ? $step : 1;
@@ -54,7 +54,7 @@ class RateService
         $multipleStr = number_format($multiple, 0, '.', '');
 
         if (function_exists('bcmul')) {
-            return (float) bcmul($baseStr, $multipleStr, 10);
+            return (float) bcmul($baseStr, $multipleStr, 12);
         }
         return (float) ($base * $multiple);
     }
diff --git a/tests/verify_madow_rate_precision_no_round_spec.js b/tests/verify_madow_rate_precision_no_round_spec.js
new file mode 100644
index 0000000..eb1d6a8
--- /dev/null
+++ b/tests/verify_madow_rate_precision_no_round_spec.js
@@ -0,0 +1,120 @@
+const fs = require('fs');
+const path = require('path');
+
+let passed = 0;
+let failed = 0;
+
+function assert(condition, testName, detail = '') {
+    if (condition) {
+        console.log(` [PASS] ${testName}`);
+        passed++;
+    } else {
+        console.error(` [FAIL] ${testName} - ${detail}`);
+        failed++;
+    }
+}
+
+console.log("========================================================");
+console.log("  马豆汇率高精度（不四舍五入）全链路自适应规范自动化测试");
+console.log("========================================================\n");
+
+// 1. 验证 IdentityService.php 的 formatRate 改造
+const identityPath = path.resolve(__dirname, '../addons/shopro/service/partner/IdentityService.php');
+assert(fs.existsSync(identityPath), 'IdentityService.php 存在');
+const identityContent = fs.readFileSync(identityPath, 'utf-8');
+
+assert(
+    !identityContent.includes("number_format((float) $value, 8, '.', '')"),
+    'formatRate() 已废除死锁的 8 位截断四舍五入 number_format(..., 8)'
+);
+assert(
+    identityContent.includes("number_format($floatVal, 12, '.', '')"),
+    'formatRate() 升级为 12 位高精度展开，杜绝科学计数法并容纳 9~12 位微小汇率'
+);
+assert(
+    identityContent.includes("rtrim(rtrim($formatted, '0'), '.')"),
+    'formatRate() 具备末尾无效 0 动态裁切能力，实现原值精准输出'
+);
+
+// 2. 验证 RateService.php 的 calcRate 计算精度
+const rateServicePath = path.resolve(__dirname, '../addons/shopro/service/partner/RateService.php');
+assert(fs.existsSync(rateServicePath), 'RateService.php 存在');
+const rateServiceContent = fs.readFileSync(rateServicePath, 'utf-8');
+
+assert(
+    rateServiceContent.includes("number_format($base, 12, '.', '')"),
+    'calcRate() 展开 baseStr 使用 12 位高精度，防止乘法前被截断'
+);
+assert(
+    rateServiceContent.includes("bcmul($baseStr, $multipleStr, 12)"),
+    'calcRate() 使用 bcmul 保留 12 位高精度安全计算'
+);
+
+// 3. 验证 DailySettleService 与 PartnerClean 统一调用
+const dailySettlePath = path.resolve(__dirname, '../addons/shopro/service/partner/DailySettleService.php');
+const dailySettleContent = fs.readFileSync(dailySettlePath, 'utf-8');
+assert(
+    dailySettleContent.includes("'rate' => IdentityService::formatRate($rate)"),
+    'DailySettleService 试算预览统一使用 IdentityService::formatRate'
+);
+
+const cleanCmdPath = path.resolve(__dirname, '../addons/shopro/console/PartnerClean.php');
+const cleanCmdContent = fs.readFileSync(cleanCmdPath, 'utf-8');
+assert(
+    cleanCmdContent.includes("IdentityService::formatRate($resetRate)"),
+    'PartnerClean 重置提示统一使用 IdentityService::formatRate'
+);
+
+// 4. 精确模拟 PHP formatRate 算法逻辑测试
+function formatRateSim(value) {
+    if (value === null || value === '' || value === undefined) {
+        value = '0.00000075';
+    }
+    const floatVal = parseFloat(value);
+    if (isNaN(floatVal) || floatVal <= 0) {
+        return '0';
+    }
+    // 模拟 number_format($floatVal, 12, '.', '')
+    const formatted = floatVal.toFixed(12);
+    // 模拟 rtrim(rtrim($formatted, '0'), '.')
+    const trimmed = formatted.replace(/\.?0+$/, '');
+    return trimmed !== '' ? trimmed : '0';
+}
+
+// 针对用户实际痛点：设置 0.000000715 时不可四舍五入为 0.00000072
+assert(
+    formatRateSim('0.000000715') === '0.000000715',
+    '汇率 0.000000715（9位小数）精准输出为 0.000000715，不发生四舍五入'
+);
+assert(
+    formatRateSim('0.000000715') !== '0.00000072',
+    '汇率 0.000000715 绝对不能被四舍五入成 0.00000072'
+);
+assert(
+    formatRateSim('0.00000075') === '0.00000075',
+    '默认汇率 0.00000075（8位小数）保持为 0.00000075'
+);
+assert(
+    formatRateSim('0.0000007153') === '0.0000007153',
+    '高精度汇率 0.0000007153（10位小数）精准输出为 0.0000007153'
+);
+assert(
+    formatRateSim(0.000000715 * 2) === '0.00000143',
+    '翻倍汇率 0.000000715 * 2 = 0.00000143 精确输出，不被截断'
+);
+assert(
+    formatRateSim('0') === '0',
+    '0 值正确输出为 0'
+);
+assert(
+    formatRateSim(null) === '0.00000075',
+    'null 兜底输出基准汇率 0.00000075'
+);
+
+console.log("\n--------------------------------------------------------");
+console.log(`测试执行结果: 通过 ${passed} 项, 失败 ${failed} 项`);
+console.log("========================================================\n");
+
+if (failed > 0) {
+    process.exit(1);
+}