Hydraulic engineering supervision steel bar size detection equipment

The utility model discloses a water conservancy project supervision steel bar size detection device, and relates to the technical field of water conservancy projects, in particular to a water conservancy project supervision steel bar size detection device, which comprises a base, and a fixing mechanism is arranged on the base and is used for fixing and limiting a steel bar in a measuring process. A measuring mechanism is arranged on the base and is used for measuring the size of a reinforcing steel bar, the fixing mechanism comprises a positioning assembly, the positioning assembly comprises a frame body fixed to the two ends of the top of the base, an annular frame is rotationally installed on the frame body, and three circumferentially-distributed positioning heads are rotationally installed on the outer edge of the interior of the annular frame through a rotating shaft; the guide assembly comprises three guide seats which are fixedly distributed on the periphery of the outer edge of the frame body, and the