AmCharts 的 Pie Chart 默认是顺时针旋转的，如果需要让它逆时针旋转，则可以设置 startAngle 属性为 180。

示例代码：

var chart = AmCharts.makeChart("chartdiv", { "type": "pie", "theme": "light", "dataProvider": [{ "country": "Lithuania", "litres": 501.9 }, { "country": "Czech Republic", "litres": 301.9 }, { "country": "Ireland", "litres": 201.1 }, { "country": "Germany", "litres": 165.8 }, { "country": "Australia", "litres": 139.9 }, { "country": "Austria", "litres": 128.3 }], "valueField": "litres", "titleField": "country", "startAngle": 180, "balloon": { "fixedPosition": true }, "export": { "enabled": true } });