The invention discloses a hydraulic lifting working platform and a platform lifting method and relates to the technical field of lifting equipment. The hydraulic lifting platform comprises a bracket, a platform and a hydraulic system, wherein the bracket includes at least one guide rail, a plurality of connecting holes are formed in the bracket in the length direction of the guide rail, the platform includes a plurality of guide wheels which are all abutted with the guide rail, the hydraulic system is arranged on the platform, one end of an actuating element of the hydraulic system is connected with the platform, at the same time, the two ends of the actuating element of the hydraulic system are detachably connected with different connecting holes, and the actuating element of the hydraulic system drives the platform to ascend and descend along the guide rail. The invention further discloses the platform lifting method. The hydraulic system is arranged on the platform and drives the platform to ascend and descend along the guide rail, therefore, the lifting height of the platform is greatly increased, and a relatively high lifting height requirement is met. The lifting stability of the platform is ensured, chains are not required, and the safety and reliability of the whole hydraulic lifting platform are improved.