Abstract: Based on the principle of both feasibility and scientificity, air environment, acoustic environment, climate environment and health environment were selected to establish the evaluation system of overall environmental comfort. And in Red River Valley Forest Park, the 3 types of landscape spaces, including the square, the forest and the waterfront, were selected for monitoring and evaluation at 4 altitudes, and the factors affecting the overall environmental comfort were analyzed. The results showed that there were differences in individual environmental factors at different times, altitudes and landscape types. OECI increased first and then decreased with time, and decreased with the altitude height going up. There were significant differences among the three landscape types, the overall environmental comfort index of the square was the highest, followed by the waterfront, and the lowest in the forest. The overall environmental comfort index of Red River Valley Forest Park was in the second level around 8: 00 and 18: 00, which was favorable for recreation. The overall environmental comfort index in the rest of the time period was in the third level, which was suitable for going out. In summer, the more shelter, the lower the air particulate matter concentration. The lower the temperature, the higher the concentration of negative air ions, the greater the relative humidity, the more comfortable the overall environment.