Abstract: The mountain cultivation experiment of Spathodea campanulata were conducted by use of 5 kinds of different density and observations were made on its tree height, DBH and crown width of Spathodea campanulata at 42 months of age,Through variance analysis and multiple comparison analysis, the results showed that the different density was significant difference among tree height, DBH and crown diameter,and differences between groups was not significant. The performance of the best density treatment was 3 m×3 m in the test, and could be applied in production. The most unsuitable density was 1 m×1 m.