Shale gas field analysis core pressure recovery device and method

The invention discloses a shale gas field analysis rock core pressure recovery device and method, solves the problem that lost fluid is difficult to measure due to the fact that a stratum environment cannot be recovered in existing field analysis equipment, and can provide guidance opinions for regional evaluation of a shale gas area and evaluation of gas storage capacity and exploitation prospects. Comprising a high-pressure tank, a containing cavity is formed along the central axis of the high-pressure tank, the two ends of the containing cavity are provided with a front closed end and a rear closed end respectively, and a rock core cavity is formed between the front closed end and the rear closed end; a plurality of pressurizing pipes are arranged on the side wall of the high-pressure tank, a pressure buffering ring cavity is formed in the side wall of the high-pressure tank and communicated with the rock core cavity, one end of each pressurizing pipe is communicated with the pressure buffering ring cavity