Easy-to-filter downhole air supply device for coal mine digging

The invention discloses an easy-to-filter downhole air supply device for coal mine digging. The easy to filter downhole air supply device includes a fixed pipeline and a filter screen, the fixed pipeline is internally and successively divided into an air inlet passage, a water cavity and a suction passage from outside to inside, the left side of the suction passage penetrates through the left sideof the fixed pipe, and the left side of the suction passage is provided with an exhaust port; and the tail end of the outer side of the fixed pipe is provided with an air induction port, the inner wall of the suction passage is provided with a sliding rail, a blade is internally provided with a second magnetic block in an embedded mode, the left end of the suction passage is provided with a waterinlet pipeline, and the water inlet pipeline penetrates through and extends from the surface of the fixed pipeline. According to the easy-to-filter downhole air supply device for coal mine digging, three pipelines of the air