The invention relates to a socket reinforced composite plastic pipe and a manufacturing process thereof, and the socket reinforced composite plastic pipe comprises a pipe wall and a socket, wherein a convex ring is arranged at the pipe wall with the inner diameter of L at the end part of the socket, plastics and resin are mixed for being taken as raw materials, and the technical scheme simultaneously produces a product under the synchronous control of a drying machine, an extrusion machine, a mold head, a mold, a vacuum box, a spraying box, a traction machine, a cutting machine and other equipment. The socket reinforced composite plastic pipe can overcome the defects that the strength and the rigidity of the cross section at the butt joint between the pipe and the socket can not bear the internal pressure in the pipe for the existing polyethylene resin composite pipe-PE pipe, thereby causing expansion, deformation and cracking of the pipe wall of a pipe, further resulting in water leakage and gas leakage of a pipeline and causing difficult maintenance of a water supply system, a gas supply system and a liquid supply system, serious loss of resources, environmental pollution caused by gas leakage and the like; and the socket reinforced composite plastic pipe is applicable to being used as connecting pipe for various water transportation projects and gas transportation projects, in particular to socket thickening and reinforcing of PE, PVC-U, PVC-M and other plastic pipes.