Ecosystem construction technology is an effective means for the arti cial water landscape to achieve stable water quality. The article introduces the practical application cases of water quality improvement and landscape improvement in the Jiuzhou Pool of Luoyang City in Sui and Tang Dynasties. The main background of the project provides targeted design ideas, analyzes technical choices and parameters, and demonstrates the new and beautiful ecology and waterscape engineering effect. The improvement of the water quality of Jiuzhou Pool provides a low-cost and ef cient governance template for the arti cial water landscape.