A filtration irrigation method, filtration irrigation device and the manufacturing method thereof, said filtration irrigation device comprises a water carrying chamber (1), in which one or more porous filter membranes (2) are arranged. One or more flow restrictors (3) corresponding to each membrane (2) are set on the wall of the water carrying chamber (1). The total permeation capacity of the flow restrictors is less than that of said filter membranes. The present invention can avoid the blockage of the device effectively.
