Well cementation and fracture technique string

The utility model discloses a well cementation and fracture technique string sequentially comprises a float shoe, a float collar, a collision base, a cementation pressure differential sliding sleeve and a cementation dropping sliding sleeve from bottom to top, wherein the float shoe, the float collar, the collision base, the cementation pressure differential sliding sleeve and the cementation dropping sliding sleeve are connected through a casing pipe, and the cementation pressure differential sliding sleeve is provided with a constant pressure valve. The well cementation and fracture technique string is low in rigidity, can be tripped into stratums very conveniently, and meanwhile can achieve good packing effects.