Abstract: By choosing five representative sample trees with the diameter of more than 60 cm and setting forty seed rain collectors, researches were conducted on the spatial and temporal pattern of seed rain of overmature Cinnamomum camphora forest since August to December in 2014 on the Lingyan Mountain in Dujiangyan on Western Sichuan Basin Border. The results showed that:(1) the total seed rainfall was 5,592 grains; the cumulative seed rain intensity reached 699.00 seeds per square metre; the annual reached 139.80 seeds per square metre; the average survival rate was 93.26%; (2) the seed rain lasted for 107 days,and the beginning period was in the late August. The peak period was from mid to late December,occupying 57.69% of the total seed rain. And the terminal period was until November. (3) The seed rain had obvious spatial pattern:Most seeds of C. camphora trees were always distributed in the understorey. The horizontal direction grains were always more than the vertical direction. The seed rain pattern showed a clump distribution; (4) there was an alternate bearing in seed production of C. camphora forest by observation for two years.