The invention discloses a manhole inspection well for overlapped circulating water concrete pipelines and an inspection method of the manhole inspection well. The manhole inspection well is connected with two or more circulating water pipes through manhole buried pipes after passing through a floor slab layer and a main workshop floor layer, and the connection between the manhole inspection well and each circulating water pipe is plugged by a manhole cover plate; and the manhole inspection well comprises an overhaul manhole platform, hoisting equipment and an inspection well channel, the overhaul manhole platform is arranged on a position more than 0.5m higher than the highest tide level of an open sea, and the bottom elevation of the manhole inspection well is lower than that of the lowest circulating water pipe. When a unit halts to require overhaul of the circulating water pipes, a second overhaul drain valve is opened, water in the circulating water pipes enters a water collecting pit through drain pipelines, and high-liquid-level pump starting, low-liquid-level pump stopping and high-liquid-level alarming are automatically performed by a drain pump located in the water collecting pit according to a set liquid level value. By using the manhole inspection well, the problem of layout position limitation of the existing manhole inspection well is solved, and the overhaul requirement can still be met during semi-underground layout of a main workshop.