Abstract: Based on the expansive region in the city park as a benchmark, and visual analysis as a principle, we can establish a more scientific and reasonable control standard for the height of the buildings around city parks. The reasonable control of the heights of the buildings around city parks is related to the location where viewers observe the buildings from a 120 visual angle at the edge of the expansive region in the city park and the height of the plants in front of the buildings. If the results of the visual analysis from different points are inconsistent, the minimum value of all the height numbers will be adopted. This paper takes the Sihai Park in Shenzhen and Tianhe Park in Guangzhou for examples to analyze the height control of the buildings around them.