Forest seeds are an important material basis for forest regeneration, and their quantity and composition have a profound impact on community dynamics and the structure and function of the whole ecosystem. In order to better understand the dynamic changes of evergreen and deciduous broad-leaved mixed forest, seed collector was utilized to monitor the seed rain in evergreen and deciduous broad-leaved mixed forest in Tianmu Mountain for one year. The species composition, seasonal dynamics, spatial dynamics, seed characteristics, and the spatial relationship between seed rain and community tree species were analyzed. The results demonstrated that:(1) the seed rain density of evergreen and deciduous broad-leaved mixed forest in Tianmu Mountain was 921.33 seeds m^-2 a^-1, and a certain numb of seeds culd be collected every month in a year, with a monthly average seed rain density of 76.78 seeds/m². The maximum seed rain density reached 263.78 seeds/m² in October, the seed rain dispersal had great spatial variability and the spatial distribution pattern of community seed rain showed aggregation distribution. (2) In total thirty species of seeds were collected in a year, and the average weight of a single seed was 0.065 g. The maximum weight was found in the Quercus myrsinifolia, which weighed 0.405 g, while the minimum weight was found in the Cryptomeria japonica sinensis, which weighed 0.003 g. There were significant differences in seed weight among species with different dispersion methods and different fruit types. In the dispersal method, the weight of seeds dispersed by gravity was the largest, while in the fruit type, the weight of nuts was the largest. (3) Plant community species made a great contribution to the composition of seed rain, especially the richness of dominant species. Different dispersal methods of seeds would affect the similarity between seed rain and the parent tree composition, with the highest value of the similarity coefficient (R_max) and the distance (d) from the seed rain collector being the largest for wind dispersal (wind dispersion:R_max=0.212, d=8 m; animal dispersal:R_max=0.143, d=6 m; gravity dispersion:R_max=0.100, d=7 m). The seed rain density was significantly and positively correlated with the number of surrounding parent trees within a certain range. In conclusion, the seed species richness of the evergreen and deciduous broad-leaved mixed forest in the Tianmu Mountain were rich. The obviously seasonal dynamics and spatial variability of the seed rain are consistent with the typical characteristics of the spatial and temporal dynamics of the seed rain in subtropical evergreen and deciduous broad-leaved mixed forest. The seeds dispersed by wind have greater advantages in long-distance dispersal.