The invention discloses a full-plastic crack and complete screwing preventing thread pipe. The full-plastic crack and complete screwing preventing thread pipe comprises a pipe body, a gear ring assembly, an inner screw thread connector assembly and a cap. An injection molding complete screwing preventing gear base is arranged on the pipe body in the axial direction, the gear base protrudes out ofthe inner wall of the pipe body, and a gear ring of the gear ring assembly is attached to the inner wall of the pipe body. A first sealing ring is embedded in the stretching-out end of the gear ring,and the inner screw thread connector assembly is inserted in the gear ring. A liquid flow guiding pipe is arranged in an inner screw thread connector of the inner screw thread connector assembly. Theupper end of the guiding pipe is clamped in a clamping groove of the inner screw thread connector, a second sealing ring is further embedded in the clamping groove, a third sealing ring is embedded inthe position of a gap between the inner screw thread connector assembly and the gear ring assembly, and the cap is screwed in the pipe body through an inner thread of the inner wall. By means of theabove manner, the structure is simple, the material is high-strength plastic, injection molding is achieved, no metal components exist, cost is low, and mounting and dismounting are convenient.