Studying the wind environment in old urban areas is extremely urgent due to the common problems of low green area rates and high building density. The article takes the old urban area of Hefei ring park as the research object, selects Prosperity Park, Baohe Park, Xinghua Park, and their surrounding environments as examples, uses CFD technology to simulate the wind environment of the site, and explores each spatial combination of elements affecting the wind environment of the old urban area in Hefei. The study shows that: (1) The average wind speed in the old city is at 0.57 m/s, which is significantly lower than the average wind speed in Hefei; (2) The Xinghua Park plot has the best wind environment; the building group in the Prosperity Park plot hinders the wind environment obviously; the Baohe Park plot has the largest area of static wind area; (3) The main influencing factors of wind environment in the old city: green space and water bodies around the city park, the spatial combination way of the building group, the angle between the building and the wind direction, and the form of the building monolith. Finally, the environmental effect of urban park green space and building layout are studied comprehensively, and based on the original old city texture, the building layout and green space layout strategies are proposed to improve the wind environment in the old city, which provides new ideas for the way of planning and updating the windway in the old city.