The invention discloses a gas-liquid multi-grade separation centrifugal atomization over-gravity rotary bed. The gas-liquid multi-grade separation centrifugal atomization over-gravity rotary bed comprises a tank body (1), a gas collection box (15) and an engine base (9), wherein a transmission box (27) is arranged at the bottom of the gas collection box; the gas collection box and the tank body are internally provided with shaft pipe (18); the lower end of the shaft pipe is connected with a shaft sleeve through spline matching; the upper end of the shaft pipe stretches out of the tank body to be communicated with a liquid inlet (19); a gas distributor (14) is arranged in the middle of the gas collection box; an atomizer (20) is arranged at the upper part of the tank body; a cyclone screen barrel (3) is arranged on the shaft pipe;, and is composed of a framework (17) and screen meshes fixed on the end face and the side face of the framework; and a gas-liquid separator is formed by mutually overlapping a polypropylene filter screen layer (28), a metal wire mesh layer (29) and a filter cloth layer (30) from inside to outside. By adopting the gas-liquid multi-grade separation centrifugal atomization over-gravity rotary bed, the dust removing effect of industrial waste gas can be remarkably improved and the maintenance labor intensity is alleviated; the maintenance cost is reduced; and the production efficiency and the transmission efficiency are improved and energy consumption is reduced.