The invention discloses a gauge table cover detection device, comprising an insulation board, a spring, a conductive board and a connection terminal; a gauge table main body is provided with a blind hole; installation holes are arranged on two sides of the blind hole; the bottom of the installation hole is communicated with the internal of the gauge table; a connection terminal is installed inside the installation hole and is connected to a control circuit which is provided with a port which is connected to a 485 communication network; the insulation board is arranged inside a screw hole; the lower end of the insulation board is connected to the spring inside the blind hole; the conductive board is in screw connection with the lower end of the insulation board; and when a fixing bolt integrates the gauge table main body with the gauge table cover, the conductive board is in conductive connection with the upper end of the connection terminal corresponding to the lower end of the conductive board. When the electric stealing happens, the behavior can be promptly transmitted to the control center through the 485 communication center, the time of opening the gauge table is recorded , the staff of the control center contact the branch leader to know the situation and the specially-assigned person is assigned to the site for confirmation and troubleshooting. The invention is targeted in the detection process, can realize the accurate, quick and prompt troubleshooting, can find the electric stealing and can stop the behavior on time, and thus prevent the safety hazard.