Slip casting is with pipe connect buckle behind transmission line engineering cast -in -place pile foundation for realize the high -speed joint of pump line and slip casting pipe. It includes transition pipe, grip block and locking mechanism, articulates respectively at the both ends of transition pipe and installs a pair of grip block, the grip block is semicircle arc structure, is equipped withlocking mechanism in corresponding of two mated grip blocks between the end, and two centre gripping hoardings become a cylindrical structures under locking mechanism's effect. The utility model provides a slip casting is with pipe connect buckle behind transmission line engineering cast -in -place pile foundation, can be quick, accurate install on slip casting pipe, pump line and is connected between grip block and pump line, the slip casting pipe and is stabilized. When needs with the grip block from the slip casting pipe, when the pump line is lifted off, only need to promote the push pedalcan, convenient operation. Active connection method between grip block and the transition pipe is to holistic washing after the slip casting of being convenient for is again accomplished.