This paper was concerned with the composite ecological restoration experiment research on the landscape water body in Xi''an Xingqing lake . Two groups of composite ecological system were constructed. The first system consists of waterweed , roche vane black algal , water lily and carp; and the second system consists of waterweed ,roche vane black algal , water lily and crucian carp. The research indicates that, in the same experimental condition, the removal rate of TN, TP, ammonia nitrogen, potassium permanganate in the first system can reach 63.2%, 97.2%, 40% and 15.6% respectively ; the removal rate of TN, TP, ammonia nitrogen, potassium permanganate in the second system can reach 50.8%, 78.5%, 41.2% and 16.5% respectively ; The purification effect of the first system is better than that of the second system, and the first system is more suitable for ecological restoration of landscape water body in XingQing lake.