the filtration section 20 of the porous filter membrane 2 and an outlet outside the water passing chamber 1 and a total water seepage capability of the one or more flow restrictors 3 is smaller than that of the one or more porous filter membranes 2 the present invention further provides an infiltration irrigation method based on the above infiltration irrigation apparatus in which one or more porous filter membranes 2 are installed in a water passing chamber 1 and formed with a filtration section 20 for accommodating the water filtered by the porous filter membrane 2 one or more flow restrictors 3 are disposed on a sidewall of the water passing chamber 1 corresponding to the location of each of the porous filter membranes 2 each of the flow restrictors 3 has one or more restricting orifices an inlet communicated with the filtration section 20 of the porous filter membrane 2 and an outlet outside the water passing chamber 1 and a total water seepage capability of the one or more flow restrictors 3 is smaller than that of the one or more porous filter membrane 2 the water in the water passing chamber 1 is made to flow axially at regular time so that the axial water stream flows along a surface of the porous filter membrane 2 to wash the surface thus when an infiltration irrigation is carried out the water is firstly filtered by the porous filter membrane 2 in the water passing chamber 1 and enters the filtration section 20 then the water filtered by the filtration section 20 flows out through the flow restrictor 3 since the total water seepage capability of the one or more flow restrictors 3 is.