The invention discloses a pest control and prevention method for tangerines. The method mainly includes three control and prevention stages of the young tree stage, the growing stage and the fruit stage. A seedling preventive is sprayed onto young trees, a Chinese herbal medicine preventive is sprayed at the growing stage, and 300-500 times liquid of 70% thiophanate methyl is sprayed at the flowering period of the fruit stage. Insecticide of different concentrations is sprayed at the different stages. According to the pest control and prevention method, the seedling preventive, the Chinese herbal medicine preventive and the insecticide all use wintergreen; the wintergreen, camphor leaves, mint, mentha spicata, lemon leaves or lemon peel, tangerine leaves or tangerines, corainder, lavender, creepers and the like are used as raw materials; natural plant volatile oil is included in the raw materials, and the volatile oil has a bactericidal effect; and meanwhile, egg development can be restrained or larvae can be killed, and tangerine insect pest is effectively prevented. Meanwhile, injurious insects cannot generate antibodies, continuous prevention and treatment are realized, approaching of plant diseases and insect pests can be prevented, fruit dropping of the tangerines is prevented, the yield of the tangerines is increased and the quality of the tangerines is improved.