Oil-smoke separation and purification all-in-one machine

The invention relates to an oil-smoke separation and purification all-in-one machine which comprises a machine box, a draught fan box and an air suction pressure stabilizing cavity, an air inlet channel is formed in the lower end of the air suction pressure stabilizing cavity, and an oil-smoke separation device is installed at an air inlet of the air suction pressure stabilizing cavity; the oil-smoke separation device comprises a first-stage oil-smoke separator and a second-stage oil-smoke separator, the first-stage oil-smoke separator comprises a first-stage oil-smoke separator box frame of which the periphery is sealed and the front and the back parts are communicated, at least two rows of first partition plates are arranged in the first-stage oil-smoke separator box frame, and every twoadjacent rows of first partition plates are arranged in a staggered mode to form a first channel; the second-stage oil-smoke separator comprises a second-stage oil-smoke separator box frame of whichthe periphery is sealed an