Rape variety‘Qingza 305’ was used as material for test of Phyllotreta striolata and Ceuthorrhynchus asper with 5 kinds of insecticide including imidacloprid, fipronil, Chlopyrifos, phoxim and triazophos to select seed treating insecticide of high efficiency, low toxicity and low residue. The results showed that the average disease rate was lowest as respectively 0.09 and 0.07 when content of Chlopyrifos was 0.5 times of recommended dosage and imidaclopri at recommended dosage and reached best control for Phyllotreta striolata. The efficiency of imidacloprid was enhanced with content increase on Ceuthorrhynchus asper control. Phoxim was most efficient with recommended dosage. The efficiency of Chlopyrifos was almost the same with recommended dosage and half of it. The results suggested that Chlopyrifos and phoxim had relatively better control over Phyllotreta striolata and Ceuthorrhynchus asper.