Coalbed biogas accumulation process simulation device and experiment method

The invention belongs to the coalbed gas exploitation field and particularly relates to a coalbed biogas accumulation process simulation device and an experiment method. The device comprises a biogas generation and storage system for simulating interaction between a coalbed and bacteria liquid, a pressure control and monitoring system used for simulating and controlling coalbed burying depth, a bacteria liquid circulation and biogas detection system used for simulating and observing methane gas amount generated in the coal reservoir, gas component and isotopc analysis and methanometer activity assay, and a temperature regulation system used for realizing biogas generation and storage system thermostatic control, wherein the pressure control and monitoring system, the temperature regulation system and the bacteria liquid circulation and biogas detection system are connected with the biogas generation and storage system, and the pressure control and monitoring system and the temperature regulation system are ex