Abstract: In order to study effect of silicon fertilizer on maize yield and yield components，Xianyu 335 was used as a test material.Four silicon fertilizer models were set，including 0（CK），basic silicon fertilizer（S1），sprayed silicon fertilizer（S2），basic both silicon and silicon fertilizer spraying（S3）.Three silicon fertilizer application methods on dry matter accumulation，yield and yield components of corn，and characteristics of corn grain quality were analyzed.Results showed that silicon fertilizer significantly increased corn dry matter accumulation，ear thickness，row number，ear number，thousand kernel weight and yield of S3 treated were significantly higher than control，yield increased by 10.33%.Compared with the control，silicon fertilizer significantly increased grain fat and protein content，starch content was significantly reduced and there was no difference between silicon fertilizer treatments.It showed that the best effect of silicon fertilizer base application+spraying could increase corn yield and improve corn quality.