Dust removal device for precision machining

The utility model discloses a dust removal device for precision machining, which belongs to the field of machining dust removal, and comprises a box body, a first fixing rod and a second fixing rod are fixedly connected in the box body, a hydraulic cylinder is rotatably connected in the first fixing rod, and a hydraulic cylinder is rotatably connected in the second fixing rod. And the output end of the hydraulic cylinder is fixedly connected with an electromagnetic adsorption disc, the left side of the box body is fixedly connected with an air inlet pipe, and the top of the second fixing rod is fixedly connected with a gear motor. The box body, the filter box and the water tank jointly form the whole device, the air inlet pipe is connected into an external air space needing to be purified, and the air draft mechanism is started to drive the interior of the filter box to form negative pressure so as to suck air in the box body into the filter box, so that the box body sucks the external air to form air flow; t