The invention relates to an overhead type pump valve system in a self-heating tank. The overhead type pump valve system comprises a motor, a pump and a pitch pipe, the motor is mounted at the top of apitch tank through a supporting pipe and a supporting flange and located outside the pitch tank, and the supporting pipe and the supporting flange are connected through a threaded fastening piece; the pump and the pitch pipe are both mounted at the top of an inner cavity of the pitch tank through a bearing cavity, the bearing cavity is provided with a flange edge and fixed on the top inner wall of the pitch tank through a bolt, the output shaft of the motor is connected with the input shaft of the pump through a coupler, and the tank wall of the tank top of the pitch tank is provided with a through hole which allows the coupler to pass through. The motor, the pump and the pitch pipe are arranged on the top of the pitch tank and the pump and the pitch pipe are built-in, because the pitch tank does not fill up usually and the pump and the pitch pipe are packaged into the bearing cavity and located at the top of the inner cavity of the pitch tank, so that the pump and the pitch pipe canbe protected from being polluted by pitch, the pump and the pitch pipe are heated by utilizing the evapotranspiration heat of the pitch, the pitch is pumped out while being heated, thus self-heating is achieved, and excessive energy is not consumed.