Square anti-blocking aerator

The utility model relates to a square anti-blocking aerator. The square anti-blocking aerator comprises an upper air bubble rectifying device, middle and lower air bubble cutting devices as well as a gas inlet assembly, wherein the upper air bubble rectifying device comprises a square rectifying cover, a rectifying plate as well as a funnel-shaped rectifying cover transition connecting housing; the middle air bubble cutting device comprises a square-tube-shaped middle housing, a middle cutting plate as well as a middle funnel-shaped transition connecting housing; the lower air bubble cutting device comprises a square-tube-shaped lower housing as well as a lower cutting plate; the air inlet assembly comprises an air inlet tube, a cover body as well as a shielding plate. The square anti-blocking aerator disclosed by the utility model is large in aeration air flow, uniform in air bubble distribution, low in air bubble release speed, large in aeration area, and weak in water stirring. The square anti-blocking aer