The traditional common wire line coring drilling technology is mainly suitable for non-coal solid geological drilling, and various problems will be encountered in coalfield exploration. This paper summarized and analyzed these problems, and designed targeted No.csp75 wire line coring drilling tool. The No.csp75 wire line coring drilling tool was analyzed and introduced, and it was applied in scientific research No.1 hole. Practice showed that the drilling tool technology had the advantages of small deviation, high drilling efficiency, low engineering cost, high rock coring rate and less accidents in the hole, the application effect of which was good, especially in complex geological conditions.