通过模型试验，得知撑杆式抓斗及剪式抓斗闭合力矩的增长过程不同，一个是先强后弱，另一个是先弱后强．根据试验结果推断，得出双绳抓斗合宜的闭合力矩曲线，提出实现这种曲线的抓斗． Through the model test, we know that the closing moments of the strut grab and the scissor grab increase differently, one is weak first and the later weak, while the other is weak first and then strong. Based on the test results, we conclude the suitable closing moment curve of double-rope grab and propose the grab to realize this kind of curve.