Abstract: Systematic investigation was carried out on the effect of intercrop on the densities of the striped flea beetles (SFB), Phyllotreta striolata (F.). The results indicated that Brassica chinensis intercrop Allium fistulosum, B. paradimesis intercrop Solanum melongena, significantly reduced the damage of the SFB (T-test) and the result from the experiments of the intercrop the preference host-plant with non-preference host-plants of SFB showed that these cultivative methods could reduced the injury by this pest. The planting practical of Chinese kale cultivated at an interval of 2,4,8,15m respectively followed by radish could decrease numbers of SFB population.