diff --git a/src/scale/Log.ts b/src/scale/Log.ts
index 815c34733f..7607584400 100644
--- a/src/scale/Log.ts
+++ b/src/scale/Log.ts
@@ -64,9 +64,13 @@ class LogScale extends IntervalScale {
 
         return zrUtil.map(ticks, function (tick) {
             const val = tick.value;
-            let powVal = fixRound(mathPow(base, val));
+            const rawVal = mathPow(base, val);
             let roundingCriterion = null;
 
+            // Fix #21099
+            const precision = numberUtil.getPrecisionSafe(rawVal) || 0;
+            let powVal = parseFloat(fixRound(rawVal, precision as number, true));
+
             // Fix #4158
             if (val === extent[0] && this._fixMin) {
                 roundingCriterion = originalExtent[0];
@@ -202,7 +206,7 @@ class LogScale extends IntervalScale {
         if (!scaleBreakHelper) {
             return;
         }
-        const {parsedOriginal, parsedLogged} = scaleBreakHelper.logarithmicParseBreaksFromOption(
+        const { parsedOriginal, parsedLogged } = scaleBreakHelper.logarithmicParseBreaksFromOption(
             breakOptionList,
             this.base,
             zrUtil.bind(this.parse, this)
diff --git a/test/logScale.html b/test/logScale.html
index 42e959b20b..9f635121ce 100644
--- a/test/logScale.html
+++ b/test/logScale.html
@@ -37,6 +37,7 @@
         <div id='main0'></div>
         <div id='main1'></div>
         <div id='main2_negative'></div>
+        <div id='main3'></div>
 
 
         <script>
@@ -279,6 +280,66 @@
 
         </script>
 
+        <script>
+
+            require([
+                'echarts'
+            ], function (echarts) {
+                const data = [
+                [0.00001782501876267492, 1.6783442046243093e-9],
+                [0.20000000000000004, 1.5239855205892977e-13],
+                [0.3097633237824966, 9.94535044331967e-14],
+                [1, 2.966552224094815e-19]
+                ];
+
+                option = {
+                style: {
+                    height: '100%',
+                    width: '100%'
+                },
+                grid: [
+                    {
+                    containLabel: true
+                    }
+                ],
+                yAxis: [
+                    {
+                    type: 'log',
+                    logBase: 10,
+                    axisLabel: {
+                        formatter: function (value) {
+                        return value.toExponential(0);
+                        }
+                    }
+                    }
+                ],
+                xAxis: [
+                    {
+                    type: 'log',
+                    logBase: 10
+                    }
+                ],
+                series: [
+                    {
+                    data,
+                    type: 'line',
+                    showSymbol: false
+                    }
+                ]
+                };
+
+                var chart = testHelper.create(echarts, 'main3', {
+                    title: [
+                        'test 3',
+                    ],
+                    option: option,
+                });
+
+
+            });
+
+        </script>
+