Stainless steel filter, composed of shell, multiple filter, backwash institutions, and differential pressure controller and other parts made of stainless steel filter shell in the diaphragm plate inside cavity can be divided into upper and lower two cavity, the cavity is equipped with multiple filter core, so that make full use of the filter space, significantly reduced the volume of the filter, are installed in the inferior vena recoil wash suction cups.When working, the turbid liquid enters the lower chamber of the filter through the inlet and enters the inner chamber of the filter core through the hole of the separator.Impurities larger than the gaps in the filter element are trapped, and the clean liquid passes through the gaps to the upper chamber, and finally is sent out from the outlet.