Special non-stop screen changer for PET and PP melt blown non-woven fabrics, double column, double mesh and double channel, non-stop screen changer, double screen simultaneous filtering, double channel screen changing and washing in turn, fully realizing continuous production. The inlet and outlet of the network are equipped with a pilot type exhaust mechanism, which completely solves the problems of bubbles and broken wires. High temperature resistance, no deformation, no material leakage. Pric