The invention discloses an oil pressure compensation device and aims to provide an oil pressure compensation device for stabilizing an oil outlet. According to the technical scheme, the oil pressure compensation device is characterized by comprising a V-shaped pipeline used for supplying oil, the V-shaped pipeline is provided with an oil pressure detecting device, and the oil pressure detecting device comprises an oil inlet located in one end of the V-shaped pipeline, an oil outlet located in the other end of the V-shaped pipeline, an oil storage tank located on the oil inlet, an oil pressuredetector located in the oil outlet, a signal projector located on the oil pressure detector, a first booster pump located on the oil storage tank, a signal receiver which is located on the first booster pump and electrically connected with the signal projector, and a controller which is connected with the first booster pump and used for controlling the first booster pump.