Aiming at some super large water gushing holes in the exploration at Laohudong phosphate mine in Wengan County of Guizhou Province, the top hole section of water releasing, weighted mud, Φ56mm wire-line coring tool, S75 wire-line coring inner pipe assembly refitting and some drilling methods were combined to form a complete set of small diameter wire-line coring construction technology for super large gushing water.