In order to solve the problem of fishing failure of the inner tube assembly in wire-line core drilling in complex formation， the development of the FDS-P wire-line coring tool has been carried out. Based on analysis of fishing failure causes， the design of the FDS-P wire-line coring tool has been completed. The rationality of the structure design was preliminarily verified through laboratory test. In order to further verify the performance， field production test has been carried out in shale gas wells in Guizhou. Sixteen core drilling runs have been successively completed， with cumulative footage of 39.03m， and core recovery over 98 percent. Core jams occurred six times and the inner tube assembly was successfully fished every time. Signals for the landing and core jams of the inner tube assembly were obtained in time. The application results showed that the structure design of the FDS-P wire-line coring tool was proper， and it had good warning on landing and core jam indication. Fishing reliability of the inner tube assembly has been improved significantly. Drilling efficiency and core recovery have been increased effectively when drilling in jam-prone formation.