Protection concrete piece for sewer

The utility model relates to a protection concrete piece for sewer and this concrete piece is provided with a double-layer manhole cover which makes the mouth of the well of the sewer provided with double safety and solves the problem that the accidents of personal casualties are easily caused after the single-layer manhole cover is lost and damaged. The concrete piece comprises a concrete body and a manhole cover. The manhole cover is divided into an upper layer and a lower layer and the upper manhole cover is located at the upper end of the concrete body and the lower manhole cover is placed on the spring eave in the concrete body. The lower manhole cover and the concrete body are both made from concrete with reinforcing steel bars built in. Because the utility model is provided with a double-layer manhole cover, is assured that the mouth of the well is not uncovered outside and the distance between two layers of the manhole covers is 10 to 20cm, the persons can not be injured even though they fall in the trap and the utility model has the function of double safety. The lower manhole cover and the concrete body are made by molding the concrete with reinforcing steel bars built in and has strong ability of resisting compression.