Observation well device

The utility model discloses an observation well device which comprises a PE pipe body, the PE pipe body is in a round pipe shape, the inner side wall of the PE pipe body is a continuous smooth face, and the outer side wall of the PE pipe body is in a corrugated shape with a protruding edge ring. The two side faces, in the length direction of the PE pipe body, of the protruding edge rings are each provided with an inclined face structure so that an isosceles trapezoid can be formed, the ends, close to the PE pipe body, of the protruding edge rings are wider than the ends, away from the PE pipe body, of the protruding edge rings, the outer side of the PE pipe body is wrapped with a first filter screen, the outer side of the first filter screen is wrapped with a second filter screen, and a plurality of water outlet holes are formed in the PE pipe body. The structure is unique, the strength is high, the inner wall is smooth, the frictional resistance is small, the circulation amount is large, the structural stren