The invention relates to a tectonic coal large-diameter well completion bidirectional reciprocating type drilling three-level reaming drilling tool which is suitable for underground coal mine. A one-level reaming and a two-level reaming are completed with a plunger drill bit, a three-level reaming is completed with a cutter wing, and the activation of the reaming is adopted with a hydraulic control mode; springs are used for converting a fixed pressure value of the reaming pumping pressure to a pressure range with an appropriate range, and the operability of controlling the reaming pressure can be improved; and a three-level reaming recycling assembly drilling tool inner pipe is composed of an upper section and a lower section which are connected and sealed through an inner pipe connectingseal ring, and the down-moving of a cutter wing blocking mechanism and the cutter-out of the cutter wing can be completed step by step. The drilling reaming with a horizontal well, a vertical well, aslant well and the other modes can be achieved at the tectonic coal and other softer formation, a three-level reciprocating type reaming operation of one of hole segments can be completed according to engineering requirements, and the requirements of the tectonic coal coal-bed gas exploitation and the other engineering activities can be met.