Based on the vacancy of new type mine explosion-proof diesel machinery detection and inspection problem, the relative working of National Safe Production Xingtai Explosion-proof Diesel Machinery Detection and Inspection Centre was taken as example, situation and development of in-use mine explosion-proof diesel machinery detection and inspection work were introduced. The practice showed that more working of detection and inspection of in-use mine explosion-proof diesel machinery could find out the possible danger and solve it, which ensures the safe and economic operation of in-use mine explosion-proof diesel machinery and provides technical basis for safe production of mine.