Manhole lid with concrete active powder

The utility model relates to a manhole lid with concrete active powder for checking manholes in urban facilities. The utility model has the advantages of low production cost, high carrying capacity, and good anti-impact and anti-fatigue performances, good weatherability, small thickness, light weight, etc. The utility model can realize that when a manhole lid made of cast iron is stolen, the manhole lid can be changed directly without changing a supporting base. The utility model can thoroughly solve the problem of stealing the manhole lid due to the low recovery and utilization value of the manhole lid; moreover, the utility model has excellent effect on environment protection because the industrial residues, such as coal ash, etc., are used and the energy consumption of products are reduced. The manhole lid is composed of a circular table, a circular band on the outer edge of the circular table, and a fish abdomen type spherical cap body which is integrally formed between the center of a circle at the bottom of the circular table and the outer circular band of the circular table, wherein the fish abdomen type spherical cap body positioned at center of a circle at the bottom of the circular table is the maximal thickness of the manhole lid, and fish abdomen type spherical cap body is in thickness descending arrangement gradually towards the circular band of the outer edge of the circular table in a curved surface form. A single-layer reinforcing mat frame is arranged in the fish abdomen type spherical cap body of the manhole lid.