解决方法：在optionToContent事件返回的数据最外层添加css样式：“user-select: text”属性；

    optionToContent: function(opt) {
        var axisData = opt.xAxis[0].data;
        var series = opt.series;
        console.log(series)
        var table = '<table  border="1" class="table-bordered table-striped" style="user-select:text;width:100%;text-align:center"><tbody><tr>'
            + '<td>机型</td>'
            + '<td>' + $("#s2id_analysisParameter .select2-chosen").text().replace(/\s*/g,"") + '</td>'
            // + '<td>' + series[1].name + '</td>'
            + '</tr>';
        for (var i = 0, l = series[0].data.length; i < l; i++) {
            table += '<tr>'
                + '<td>' + series[0].data[i][0] + '</td>'
                + '<td>' + series[0].data[i][1] + '</td>'
                // + '<td>' + series[1].data[i] + '</td>'
                + '</tr>';
        }
        table += '</tbody></table>';
        return table;
    },
    contentToOption: function(HTMLDomElement, opt){undefined
        return opt;
    },
}