Objective To analyze the correlation of family feeding style and negative emotion of parents with childhood malnutrition, in order to guide family scientific feeding and to prevent the occurrence of malnutrition in children. Methods A total of 75 malnourished children in Maternal Child Health Hospital of Guangxi Autonomous Region from April to October 2020 were enrolled in this study. And 77 healthy children during the same period were selected into the control group. The parents of children in two groups were investigated by questionnaire. The difference in children's eating behavior was compared, and the correlation of family feeding pattern and negative emotions of parents with childhood malnutrition was analyzed. Results In terms of eating behavior, the scores of oversatiation response (t=2.104), food response (t=4.206), food preference (t=9.099) and craving for drinks (t=4.435) of malnourished children were lower than those of children in the control group (P<0.05). There were statistically significant differences between the malnutrition group and control group in the parents'perception of children's weight (t=3.167), forced eating (t=3.354) and supervised eating (t=3.726) in terms of family feeding pattern (P<0.05). In the emotion of parents, the incidence of anxiety in the malnutrition group was higher than that in the control group (χ²=8.660, P=0.003). Parents'perception of their children's weight (r_s=0.246), worry (r_s=0.213), forced eating (r_s=0.254), supervised eating (r_s=0.284), anxiety of parents (r_s =0.218), depression (r_s =0.334) were positively correlated with the occurrence of malnutrition (P<0.05). After adjusting for confounding factors, parents'perception of children's weight, forced eating, supervised eating and depression were independently influencing factors for the occurrence of malnutrition (P<0.05). ROC curve analysis showed that the AUC values of parents'perception of children's weight, forced eating, supervised eating and depression in predicting the occurrence of child malnutrition were 0.639, 0.645, 0.669 and 0.692, respectively(P<0.05). Conclusions Family feeding patterns and anxiety of parents are associated with malnutrition of children. It is supposed to adjust family feeding patterns, relieve negative emotions of parents, and assist children to correct their bad diet behavior, thereby reducing the risk of malnutrition.