In view of an analysis of the impact of water bodies on the thermal and humid environment of building blocks around the lake under strong wind conditions, CFD (computational fluid dynamics) method has been adopted for a numerical simulation of four types of building block shapes: low rise, high rise, rising, and falling. The results show that under strong wind background, the water body exerts no effect on the temperature and humidity of upstream building blocks, but has a significant impact on the temperature and humidity of middle and downstream building blocks, with the humidification and cooling effects mainly concentrated in the central downstream area. The height change and height difference of the building block have a significant influence on the temperature and humidity field within the blocks, among which the low buildings on the inner side of the lake and the height difference between the inside and outside accelerate the airflow, which results in a better thermal and humidity environment for the low rise and rising building blocks around the lake. Meanwhile, the obstruction of high buildings on the inner side of the lake leads to a poorer thermal and humidity environment for the high rise and falling building blocks around the lake. The central area downstream of the building block (V5 street valley) has the best thermal and humid environment among the four forms, with the low-temperature gas extending a diffusion distance of 100~300 m after flowing through the building blocks. The results show the substitution of some dense buildings with water bodies helps to optimize the thermal and humid environment of building blocks on a large scale based on a reasonable layout.