[Objective] Non-point source pollution in orchards is one of the contributing factors to the pollution in surrounding water environment. To explore the source, migration characteristics and influencing factors of non-point source pollution in orchards is helpful to scientifically prevent and control orchard non-point source pollution and improve the quality of soil and water environment. [Methods] Based on the latest research results at home and abroad, the source, migration characteristics and influencing factors of nitrogen, phosphorus, heavy metals and pesticides in orchards were analyzed, the existing research deficiencies were analyzed, and the future research directions were put forward. [Results] ①The application intensities of nitrogen fertilizer in orchards (565-1071.2 kg/hm2?a) and the loss coefficients of nitrogen and phosphorus were generally higher than those in farmland. Nitrogen and phosphorus were easy to accumulate at the bottom of orchard slope, and the spatial variabilities in soil was higher than that in farmland and tea garden. ② When the orchards were not irrigated by sewage and there were no industrial activities around, fertilizers, pesticides and traffic activities were the main sources of heavy metals in the orchard soil, and the migration ranges of heavy metals in the soil profile were about 0.005-0.8 m. ③ The dosages of benzimidazole and pyrethroid pesticides in orchards were about 40-4050 g/hm2 and 60-150 g/hm2, respectively. After the application of weakly adsorbed pesticides, it was greatly affected by short-term rainfall, and after the application of moderately adsorbed pesticides, it was affected by rainfall and evaporation. The pesticide contents in the river showed a seasonal correlation with rainfall. ④ In order to control non-point source pollution in orchards, priority should be given to the treatment of initial runoff to effectively intercept sediment. Planting grasses under fruit trees can reduce runoff by 7.1% -98.7%, control sediments by 15.7% -99.8%, intercept nitrogen and phosphorus by 4.6% -98.5% and 15.3% -96.6%, and reduce heavy metals by 18.8% -90.1%. ⑤ The migration characteristics of orchard non-point source pollution are consistent with the temporal and spatial distribution of rainfall. 20% of surface runoff outputs more than 50% of pollution load. Under extreme rainfall, the runoff coefficients and loss loads of nitrogen and phosphorus in orchards were 2.6 times and 11.5 times higher than those of normal rainfall. Rainfall volume and rainfall intensity are the main factors affecting the migration of heavy metals and pesticides. Under the rainfall with long duration and moderate intensity, heavy metals and pesticides are more likely to infiltrate and migrate downstream. [Conclusion] The fine management of orchards in China is still in the preliminary stage. In the future, the migration laws of non-point source pollution such as nitrogen, phosphorus, heavy metals and pesticides under the influence of complex factors needs to be explored, the spatiotemporal scope and degree of non-point source pollution should be accurately identified, and the loss of non-point source pollution should be effectively reduced under the premise of ensuring the quality of fruits, improving the ecological benefits of orchards and reducing environmental risks.