The invention discloses a cementation and fracture technique string and a cementation and fracture technique process. The 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 cementation and fracture technique process comprises the steps of a well cementation process including tripping the cementation and fracture technique string into a wellhead, pouring cement paste into the cementation and fracture technique string, and waiting on cement setting after a rubber plug moves to the collision base, and a fracture process including pressurizing the cementation and fracture technique string from the ground to open the constant pressure valve arranged on the cementation pressured differential sliding sleeve and then performing fracture. The cementation and fracture technique string is low in rigidity, can be tripped into stratums very conveniently, and meanwhile can achieve good packing effects.