Floating type retaining dam and construction method thereof

The invention discloses a floating type water retaining dam and a construction method thereof.The floating type water retaining dam comprises a plurality of connecting bases installed on a foundation bed, the adjacent connecting bases are hinged in sequence, each connecting base is connected with a barrier plate, each connecting base is provided with a vertical installation pipe, the vertical installation pipe is movably sleeved with a floating type air bag body, and the floating type air bag bodies are connected with the barrier plates. Each floating type air bag body is communicated with an inflation main pipe, each floating type air bag body is inflated to expand the floating type air bag body, and the adjacent floating type air bag bodies are gradually close to each other and are in contact extrusion to form a floating type air bag wall; according to the construction method, the floating type water retaining dam is installed at the river channel of the corresponding form and adjusted according to differen