The invention belongs to the platform lifting technology, and relates to a four-stand-bar synchronous hydraulic lifting mechanism. The four-stand-bar synchronous hydraulic lifting mechanism comprises a mounting vehicle body, four hydraulic stand bars, a hydraulic control box and a synchronous cylinder. The front part and the rear part of the left side frame and the front part and the rear part of the right side frame of the mounting vehicle body are respectively provided with one hydraulic stand bar with an actuator cylinder, the synchronous cylinder comprises four hydraulic chambers and four piston heads connected to a same piston rod, the outlets of the four hydraulic chambers are connected to the four hydraulic stand bars respectively, and the input end of the synchronous cylinder is connected to a hydraulic general oil way through a hydraulic control box containing a hydraulic check valve and a three-position four-way valve. The manual type four-stand-bar synchronous hydraulic lifting mechanism can work in working occasions with small height, the adjustment of the three freedom degrees of the synchronous lifting, the synchronous pitching and the synchronous rolling of the mounting vehicle body can be achieved, operation is convenient, adjusting precision is high, and the four-stand-bar synchronous hydraulic lifting mechanism has good practical application value.