This study was conducted for Platycladus orientalis and weeping willow in Gaoliying Experimental Base, Shunyi District, Beijing. The composition and release patterns of volatile organic compounds (VOCs) released by these plants were analyzed using dynamic headspace bag collection method and automatic thermal desorption gas chromatography/mass spectrometry technology. In order to obtain more comprehensive information, samples were collected at different times and weather conditions, and relevant information was recorded.Through the analysis of the original data, the composition and relative percentage of beneficial volatile organic compounds (BVOCs) were determined. The research results show that the BVOCs released by Platycladus orientalis and weeping willow in different seasons mainly include alcohols, aldehydes, olefins, and other compounds. These beneficial BVOCs play important roles in the physiological and ecological functions of plants, and are of great significance for a deeper understanding of the interactions between plants and the environment.Research has found that the composition of BVOCs released by Platycladus orientalis and weeping willow varies in different seasons. Secondly, the study analyzed the content and variation trend of beneficial BVOCs components in Platycladus orientalis and weeping willow in different seasons. The release patterns of Platycladus orientalis show significant differences in different seasons. The release pattern in spring presents a "single peak and single valley" curve, while the release pattern in summer presents a "single peak" curve, while the release pattern in autumn presents a "double peak and single valley" curve. This indicates that there are significant seasonal changes in the release of volatile matter from Platycladus orientalis in different seasons. In contrast, the release pattern of weeping willows is relatively stable in different seasons, presenting a consistent "unimodal" curve. This indicates that the volatile matter release pattern of weeping willows is relatively continuous and stable in different seasons, unlike Platycladus orientalis, which is greatly affected by seasonal changes.In addition, the study also found that the relative content of beneficial BVOCs released by Platycladus orientalis and weeping willow reached its peak around noon, while the trough period appeared before and after the peak period. This indicates that the release of volatile matter from plants is influenced by sunlight and other environmental factors, and there is a clear diurnal variation pattern. To sum up, the study used advanced analytical techniques to collect and analyze the volatiles of Platycladus orientalis and weeping willow in Gaoliying Experimental Base, Shunyi District, Beijing. The results showed that there were significant differences in the beneficial BVOCs released by Platycladus orientalis and weeping willow in different seasons, with seasonal variations. In addition, their volatile matter release is also affected by daily changes.