The invention provides a pressurized water reactor nuclear power plant spent fuel pool float removal system. The float removal system comprises a spent fuel pool, a filter screen, a water outlet pipeline and a water inlet pipeline, wherein the spent fuel pool comprises an inner spent pool and an outer spent pool; a channel is formed between the inner spent pool and the outer spent pool; the filterscreen is arranged between the inner spent pool and the outer spent pool and used for intercepting impurities flowing into the outer spent pool from the inner spent pool; one end of the water outletpipeline is arranged at the bottom of the outer spent pool and the other end of the water outlet pipeline is connected with a cooling and purification device; and one end of the water inlet pipeline is inserted into the inner spent pool from the upper part of the inner spent pool and the other end of the water inlet pipeline is connected with the cooling and purification device. Through the pressurized water reactor nuclear power plant spent fuel pool float removal system, the clarity of pool water can be effectively improved.