The invention discloses a low-pressure water inlet anti-blocking wastewater electromagnetic valve. The low-pressure water inlet anti-blocking wastewater electromagnetic valve comprises a valve body, apress cover, a press-cover sealing ring, a flow barrel, a flow barrel sealing ring, a guide sleeve, a sliding rod, a sliding rod sealing ring, a flow needle, an anti-blocking spring, a sealing ring assembly and a guide rod, wherein the valve body is of a T-shaped double-flow channel structure with flow channels vertically communicated, a wastewater flow channel and a main flow channel are perpendicularly intersected at a water sealing opening, when the electromagnetic valve is closed, water in the valve body enters the flow barrel of the wastewater flow channel, the guide sleeve is arranged in the flow barrel, the sliding rod sealing ring which is in tight fit with a water guide ring is arranged in the guide sleeve, as water pressure in the wastewater flow channel changes, the sliding rodsealing ring drives the sliding rod and the flow needle move back and forth in the water guide ring, the flow needle moves back and forth so that water scale or tiny impurities in the wastewater outlet holes can be removed, and therefore water flow is kept smooth, an uniform and stable small flow is achieved, the flow of the wastewater can be accurately controlled, the operation noise is reduced,and blockage of the wastewater when flowing out of a pipeline is prevented.