The utility model relates to an accelerator speed control device of a driving school vehicle. Accelerator pedal, the bottom of the accelerator pedal is connected with an arc rod; a connecting piece Ais arranged at one end of the accelerator pedal away from the body; a connecting piece B is arranged in the vehicle body below the accelerator pedal; the connector B is movably hinged to the bottom ofthe connecting column; a connecting piece a is arranged above the connecting column, the connecting piece a is matched with the connecting piece A, and the included angle between the connecting column and the accelerator pedal is larger than or equal to 90 degrees. The accelerator pedal is simple and detachable, and inaccurate practice and even accidents caused by mistaken stepping on an accelerator in the subject II practice process are avoided.