Abstract: Objective To explore the nutritional status of young children in a city in Zhejiang from 2002 to 2015 and analyze potential influencing factors. Methods We used electronic medical recorder system and extracted maternal and offspring's medical information from the decoded database. Z-scores were used to elevate nutrition status. Logistic regression models were used to explore the influencing factors of the nutritional status. Results Among 48 827 children, the prevalence rate of underweight, stunting, thinness, overweight and obesity were 1.43%, 1.31%, 1.90%, 2.62%, and 0.34%, respectively. The prevalence of obesity had significant differences between genders(χ²=5.164,P=0.023). The prevalence of underweight was increased, and the prevalence of overweight and obesity were decreased. Furthermore, mother with higher educational level had lower risk of child's malnutrition, and mother with higher pre-pregnancy body mass index (BMI) had higher risk of child's overweight(OR=1.063, 95% CI:1.057-1.069,P<0.001) and obesity(OR=1.074, 95% CI:1.060-1.088,P<0.001); Maternal high-risk pregnancy was the risk factor of underweight (OR=2.214, 95% CI:1.928-2.542,P<0.001), stunting (OR=2.543, 95% CI:2.193-2.949,P<0.001) and thinness (OR=1.211, 95% CI:1.062-1.380,P=0.004) in children. Conclusions Overall, children's physical development in this city was in good condition. However, problems are still existing with malnutrition and overnutrition. Maternal high pre-pregnancy BMI, low educational level and high-risk pregnancy were independently related to child's malnutrition and overnutrition.