Split mounting type blocking device for water conservancy flood control

The invention relates to the technical field of water conservancy flood control devices, in particular to a split mounting type blocking device for water conservancy flood control. Comprising a baffle, a combination cavity is formed in the middle of the baffle, positioning assemblies connected with the combination cavity are arranged on the two sides of the baffle respectively, sealing bags are arranged in the middles of the positioning assemblies and at the bottom of the baffle, and a water inlet hole is formed in the upstream face direction of the baffle; a butt joint hole and a notch which are connected with the positioning assembly and the sealing bag are formed in the two sides of the middle piece respectively, a sealing assembly is arranged at the bottom of the middle piece, a drainage channel communicated with the butt joint hole is formed in the middle piece, and the middle piece is communicated with the combined cavity through the positioning assembly; the multiple baffles and the corresponding middl