Tractor with overload reminding function

The tractor comprises a tractor body, a reversing component assembled on the tractor body, a wrench rod, a torque sensor and a switching sleeve, the reversing component is provided with a connecting rod, a torque scale is arranged on the peripheral surface of the wrench rod, a torque adjusting handle is movably connected to the wrench rod in a sleeved mode, and the torque adjusting handle is connected with the wrench rod in a sleeved mode. A lock sleeve is arranged on the torque adjusting handle, the torque sensor is fixed to the head of the wrench rod, a connector is arranged at the front endof the sensor and extends out of the head of the wrench rod, one end of the adapter sleeve is connected with the connecting rod, and the other end of the adapter sleeve is connected with the connector. The preset torque wrench and the alarm sound reminding technology thereof are applied to the tractor, the adapter sleeve and the connector are additionally arranged on the torque sensor, after a torque set value is set, th