The invention discloses an intelligent water depth measuring device for a water conservancy project. The device comprises a bottom plate; a supporting column is fixedly connected to the front end of the upper surface of the bottom plate; a winding wheel is rotationally connected to the upper end of the inner side surface of the supporting column; an adjusting cylinder is fixedly connected to the rear side of the upper surface of the bottom plate; supporting strips are fixedly installed on the two side surfaces in the adjusting cylinder; limiting arc-shaped grooves are formed in the outer surfaces of the supporting strips; an adjusting rod is connected to the inner side surfaces of the limiting arc-shaped grooves in a sliding mode; locking threaded holes are formed in the upper sides of thetwo end surfaces of the adjusting cylinder; the inner side surfaces of the locking threaded holes are in threaded connection with locking screws; and the inner ends of the locking screws are connected to the two ends of the outer surface of the adjusting rod in a sliding mode. According to the intelligent water depth measuring device for the water conservancy project, the adjusting cylinder on the bottom plate is connected with the adjusting rod in a sliding mode, so that in combination with the internal supporting strips and locking screws, the use convenience and stability can be greatly improved, and the measurement safety is ensured.