In terms of features of semitrailer tractors, the central steering handling quality test method widely used in foreign countries is introduced and modified. The evaluation method for test results is introduced and is verified with tests of a domestic tractor and a Scania 360 tractor. 根据半挂牵引车的特点,引入并修改了国外广泛应用的中间位置转向操纵稳定性试验方法,介绍了对试验结果的评价方法,并结合某国产牵引车和Scania360型牵引车进行了试验验证。