对于Chart.js 2. *，比例从零开始的选项列在线性比例尺的配置选项。用于数字数据，y轴很可能就是这种情况因此，您需要使用以下选项：

For Chart.js 2.*, the option for the scale to begin at zero is listed under the configuration options of the linear scale. This is used for numerical data, which should most probably be the case for your y-axis. So, you need to use this:

options: {
    scales: {
        yAxes: [{
            ticks: {
                beginAtZero: true
            }
        }]
    }
}

还提供了示例折线图此处，其中该选项用于y轴。如果您的数值数据在x轴上，请使用 xAxes 而不是 yAxes 。请注意， yAxes （或 xAxes ）使用数组（和复数），因为您可能还有多个轴。

A sample line chart is also available here where the option is used for the y-axis. If your numerical data is on the x-axis, use xAxes instead of yAxes. Note that an array (and plural) is used for yAxes (or xAxes), because you may as well have multiple axes.