The invention discloses a multifunctional metal net flying cement dust electrostatic precipitator. The multifunctional metal net flying cement dust electrostatic precipitator comprises a dust processing main bin, a dust input channel and a gas output channel, the dust processing main bin divides the internal space into a filtered flying dust collecting bin and a flying dust discharge collecting bin through a vertically arranged function partition insulating plate, a filtered flying dust collecting hopper is arranged at the bottom of the filtered flying dust collecting bin, a flying dust discharge collecting hopper is arranged at the bottom of the flying dust discharge collecting bin, a gap allowing an air flow to go through is arranged between the upper end of the function partition insulating plate and the top wall of the dust processing main bin, the filtered flying dust collecting bin is internally provided with a dust collecting filter screen, a plurality of discharge electrode metal bars are vertically suspended in the flying dust discharge collecting bin, and a dust collection electrode fitting plate is arranged on the side wall of the flying dust discharge collecting hopper. The bag type dust collector and the dust electrostatic precipitator are combined, and better effects of selecting and collecting a cement powder are achieved.