Low-pressure jet aerator

The invention relates to the technical field of sewage treatment equipment, in particular to a low-pressure jet aerator which comprises an aeration cover, an aeration assembly, a bottom shell and a diffusion assembly, a fixing groove is fixedly installed in the bottom shell, and an air bag is fixedly installed in the fixing groove; a connecting cover is fixedly mounted at the top of the bottom shell, and six water inlets are formed in the side face of the connecting cover. By arranging the pulse type aeration structure, large bubbles are intermittently released into the connecting cover while sewage is aerated and oxygenated, the aeration effect is improved, silt entering the connecting cover is cleared out to achieve the anti-blocking function, the aerated sewage is guided by the diffusion assembly when discharged, and the aeration effect is improved. The jet range can be adjusted according to the size of a sewage pool where the low-pressure jet aerator works currently, so that the overall aeration effect on