针对目前双吊点臂塔机起重力矩曲线的理论值与实测值误差较大的现实 ,根据塔式起重机力矩限制器的作用机理 ,指出常用起重机起重力矩特性方程的局限性 ,对双吊点吊臂塔式起重机是不准确的 .笔者通过力学分析提出双吊点吊臂塔式起重机的起重力矩特性的计算方法 ,并由程序实现之 ,从而解决了双吊点塔机的起重力矩曲线绘制的理论 ,并提出了实际应用中对理论曲线调整的方法 ,最后作为实例给出了用程序和常规算法计算 42m双吊点臂QTZ31 5塔机的起重力矩特性表 . In view of the fact that the theoretical value and the measured value of the crane lifting torque curve of the existing two-overhead tower crane have a large error, according to the mechanism of the tower crane torque limiter, the limitations of the crane crane torque characteristic equation are pointed out. Point crane tower crane is not accurate.The author puts forward the calculation method of lifting torque characteristic of the crane crane with double suspension point by mechanics analysis and realizes it by the program so as to solve the problem of crane lifting Torque curve drawn theory and put forward the practical application of the theoretical curve adjustment method. Finally, as an example, given by the program and the conventional algorithm to calculate 42m double-lift arm QTZ31 5 crane crane torque characteristics table.