The stainless steel trench manhole cover is composed of manhole frame and manhole cover. The manhole cover is designed as a square groove, and its section can also be inverted trapezoid. The surface can be directly paved with floor tiles, which can make the manhole cover and manhole frame fit more closely and improve the design of the current manhole cover. The invisible manhole cover only exposes four side frames on the ground surface, and the middle of the manhole cover is concave to a certain depth. The bottom of the concave surface is designed as an arc, and the concave surface is equipped with reinforcing bars.

   The manhole cover is designed to be harmoniously integrated with the surrounding environment. According to different environments, different materials are filled in the manhole cover, so that 95% of the area of the whole manhole cover is the same as the surrounding environment, so as to achieve the best invisible purpose.