The invention discloses a water conservancy project detection device based on the internet of things. The device comprises a detection box, a sealing cover, a water inlet, a water inlet cover, a handle, a baffle, a filter box, a clamping port, a coarse filter layer, a fine filter layer, an activated carbon layer, gauze, a metal net, side holes, pull rods, a water outlet and a baffle disc. The topof the detection box is sleeved by the sealing cover; top holes are formed in the two sides of the bottom of the sealing cover, and the top holes are sleeved in the detection box; the side holes are formed in the two sides of the sealing cover; the pull rods are sleeved in the side holes; a pull disc is fixed at one end of each pull rod through a screw; the pull discs are positioned at the two sides of the sealing cover; and the other end of each pull rod is provided with a clamp block in a welding manner. The water conservancy project detection device based on the internet of things is simplein structure and convenient to operate; a computer is connected with the internet of things to calculate and compare the sediment weight ratio, so that the water conservancy project quality is detected conveniently and rapidly; and meanwhile, through internet of things technology, the comparison range is wider, manual operation is not needed, and comparison is more accurate.