The utility model discloses a torque converter adds AMT's variable speed transmission system, include that torque converter and dry type clutch add AMT and correlation control unit, install torque converter additional between engine flywheel and dry type clutch, dry type clutch connects the AMT derailleur at the back. The utility model discloses well torque converter arranges between engine flywheel and dry type clutch that torque converter and the bu tong cooperation work in the moment of dry type clutch are passed through in the AMT gear shift, realize smooth -going gear shift, improve dry type clutch's life -span, improve the gear shift ride comfort. This transmission system gear shift is smooth -going, and passes through torque converter's bending moment effect, has improved the starting ability of whole car and the suitability of whole car.