Pressure-bearing type plastic liner, production method and solar water heater using liner

The invention relates to a pressure-bearing type plastic liner, a production method and a solar water heater using the liner. The pressure-bearing type plastic liner comprises a liner body and end covers arranged on two sides of the liner body. The liner body comprises a first plastic layer, a net-shaped rib and a second plastic layer from inside to outside. The end covers are made of plastic materials. The pressure-bearing type plastic liner has the advantages that the liner body and the net-shaped rib are combined, the plastic linear is combined with a water inlet pipe, a water outlet pipe and a connection part to be formed integrally, work procedures are simplified, energy, time and labor cost are saved, a locating ring is embedded at the position of the end cover on one side of the plastic liner, a circle of screw holes are formed in the locating ring, an auxiliary heating device is in sealing connection with the locating ring through the screw holes and the sealing pad, sealing performance is good, combi