Based on the understanding of non-destructive testing technology,the application of ultrasonic testing technology is firstly analysed specifically,and then the positioning,quantitative and qualitative discussion of equipment defects are carried out one by one,and then the effect is finally discussed with the actual technical test.The results show that ultrasonic detection technology can help mining enterprises better understand the actual faults of the equipment,and improve the stability of mining through the efficient operation of the equipment.