The utility model provides a can observe formula cable trench cover, it is including the apron and the fixed frame that are rectangle, the surface of apron one side is equipped with first handle, its opposite side is sold the axle and is connected with fixed frame, fixed frame lower extreme periphery is equipped with the sand grip of inside extension, it is embedded in observing screen frame to observe the net, observation screen frame establishes and supports in fixed frame and by the sand grip, apron internal surface both sides are equipped with a group link mounting respectively, it includes connecting piece and mounting to connect the mounting, and the connecting piece is articulated mutually with the one end of back shaft, when the apron is closed, the other end of back shaft is fixed in on the mounting, when the apron was liftd, the other end of back shaft supported on fixed frame. The utility model relates to a can observe formula cable trench cover has made things convenient for the staff to observe the operational aspect of cable in the cable pit in protection of cables to under moist weather condition, can reduce the moist degree in the cable pit, improve the operating environment of cable.