The invention provides a traction machine, which comprises a body, a central control module, an arm lifting module and a lifting control module. The central control module is arranged on the body and is used to control the forward or backward of the body, the arm lifting module is arranged on the body, the lifting control module is arranged on the body and is used to control the lifting of the arm lifting module, wherein the central control module and the lifting control module signal are independent.Thus, the lifting and lowering of the lifting arm module can be controlled independently, so the user can determine the height of the lifting arm module to be operated according to the soil properties or terrain, and then control the depth of the agricultural tools entering the soil separately.本創作提供一種曳引機，其包含一機體、一中控模組、一舉臂模組及一昇降控制模組，中控模組設置於機體且用以控制機體前進或後退，舉臂模組設置於機體，昇降控制模組設置於機體且用以控制舉臂模組升降，其中中控模組與昇降控制模組訊號獨立。藉此，舉臂模組的昇降可單獨被控制，因此使用者可根據土壤性質或地形決定所欲操作的舉臂模組高度，進而單獨控制農具進入土壤的深度。
