To provide a theoretical basis for scientific fertilization in Chongming district, Shanghai, by measuring the effective soil nutrients, the measurement of mineral element content of leaves and nutritional status. Soil and leaf survey and sampling were carried out in 30 Wenzhou mandarin orange orchards in Chongming District, Shanghai, and the mineral nutrient content of soil and leaves was determined, and the nutrient status of soil and leaves was confirmed by comparing with the recommended indicators. The results showed that: the soil of Wenzhou mandarin mandarin orange garden in Chongming district, Shanghai was alkaline overall, with an average pH of 7.78, and 83.3%, 97.3% and 90.0% of the soil alkali hydrolysis, available phosphorus and effective manganese were at the lack or low levels of Wenzhou mandarin orange garden in Chongming district, Shanghai, and the remaining soil nutrient elements were overall at appropriate or high levels. The proportion of potassium, calcium and zinc deficiency in leaves of Wenzhou mandarin orange orchard was 80.0%, 60.0% and 100.0%, respectively. 80.0% of Wenzhou mandarin orange orchards had excessive nitrogen content, and the content of other elements was at an appropriate level. Comparing soil nutrients