The novel technology for wastewater containing heavy metal ions disposal by application the micro-porous filter is described. The heavy metal ions wastewater chemically disposed is filtered to separate the solid and the filtrate, and the cake is dewatered by use of the micro-porous filter. The separate efficiency of the micro-porous filter is high and steady. The filtrate is consonant with the discharging requirement. The water content of the cake is 30%~40%. The operation is automatic, fast and convenient, and the equipment is long in service life, less in occupied field and power consumption. It is successfully applied to more than one thousand domestic factories.