The invention discloses an in-situ circulating 
treatment system for landscape 
lake water, and belongs to the technical field of landscape water purification. The 
system is composed of a 
surface runoff collecting tank, an ecological 
percolation tank, an enhanced purification unit, a circulating power 
system and a landscape 
lake water main 
body water area, wherein the enhanced purification unit consists of a bottom 
aeration device and a biological purification unit; the circulating power 
system consists of a circulating power pump and a circulating pipeline; an ecological box and a multi-stage 
aeration device are arranged in the landscape 
lake water main 
body water area; the 
surface runoff collecting tank is positioned at the lowest position of a landscape lakeshore 
terrain and is communicated with the ecological 
percolation tank; the ecological infiltration tank is arranged along the inner side of a landscape lakeshore; the enhanced purification unit is arranged near the communicating part of the 
surface runoff collecting tank and the ecological 
percolation tank; and the circulating power system is located in the center of the landscape lake 
body water area. The ecological percolation tank, a biological floating 
bed and the ecological box are all made of 
sponge concrete and have good water permeability, air permeability and 
water binding capacity. The system is suitable for various 
urban landscape lakes, realizes in-situ treatment of landscape lake water, improves the quality of the landscape lake water and increases the life happiness index of residents according to the 
water quality characteristics of the landscape lake water and the green and ecological design concepts, and has the advantages of low operation cost, easiness in control, environment friendliness and the like.