In view of the relative shortage of water resources in the northern region，combined with the Wangdao ship lock project in the Xiaoqing River，the water-saving measures of the ship lock are discussed，and two different plane layout schemes and operation modes of multi-stage water-saving pools with deep and shallow pools and different water deliveries are put forward，namely，single-stage water-saving pools operating alone and single-stage water-saving pools combined with pumping station operation. The following conclusions are drawn from the comparative analysis：1）Both of two water-saving schemes meet the requirements of the specification and water-saving use.2）The multi-stage water-saving tank has a high water saving rate，and the single-stage water-saving tank combined with the pump station has a long water delivery time. 3）The selection of water-saving schemes for similar projects needs to be comprehensively determined in combination with water resource conditions，ship lock throughput capacity requirements，water delivery time，site layout，construction conditions，and project investment.