PE bag convenient to exhaust

The utility model discloses a PE bag convenient to exhaust, which comprises a PE bag main body, a self-sealing strip is arranged at an opening at the top end of the PE bag main body, and lifting belts are arranged on two sides of the PE bag main body. According to the PE bag convenient to exhaust, by pulling a pull ring, a piston is driven to move downwards, negative pressure is generated in a working pipe, a first sealing plate is affected by the negative pressure and slides downwards in the working pipe, a first spring is stretched, an air suction hole in the first sealing plate is separated from the top wall of the working pipe, air in the PE bag body is sucked into the working pipe through the air suction hole, and the air in the PE bag body is exhausted. Then a pull ring is pushed upwards, a first guide rod pushes a piston to move upwards, so that the intensity of pressure in a working pipe is increased, a second sealing plate is pushed by air pressure to move to be separated from an exhaust pipe, a seco