Manhole cover

A manhole cover of an inspection well comprises an opening device, and the opening device comprises a mechanical oil pressure opening structure and a manual opening structure. The mechanical oil pressure opening structure is an external small hydraulic station, the hydraulic station and a local control cabinet of the inspection well are integrally installed, and the well lid is rapidly started through oil pressure. The manhole cover is an integrated device and comprises a cover seat, an on-site hydraulic station and a movable hand-pulling catenary hoist used for installing the manhole cover. The opening process of the well lid of the inspection well objectively eliminates subjective behaviors of operators violating safety operation regulations. A built-in folding handrail is arranged on the inner side of a manhole cover of the inspection well, the inside of the manhole cover is folded and flatly placed to play a role of preventing a partition plate from falling, and after the manhole cover is opened, the hand