The invention relates to coalbed methane exploitation equipment, in particular to an adaptive device for flowing pressure during coalbed methane exploitation. The adaptive device comprises a walking-beam pumping unit, a walking-beam strain sensor, an electric energy measuring unit, a frequency converter, a single chip microcomputer system and a motor speed sensor, wherein the walking-beam strain sensor is fixed at the top end of a walking beam and positioned between a walking beam fulcrum and a horsehead, the output end of the frequency converter is connected with the motor connecting end, the motor speed sensor is arranged on a motor, the electric energy measuring unit is connected with the input end and the output end of the frequency converter, the input end of the single chip microcomputer system is connected with the walking-beam strain sensor, the electric energy measuring unit and the motor speed sensor, the output end of the single chip microcomputer system is connected with the control end of the frequency converter, and the electric energy measuring unit, the frequency converter and the single chip microcomputer system are mounted in an electric control cabinet jointly. The adaptive device for the flowing pressure during coalbed methane exploitation solves the problems of flowing pressure instability, low methane production rate, low system efficiency and the like caused by the fact that liquid level is instable and the liquid level height cannot reach specified indexes during coalbed methane exploitation.