Background and Aim In modern life, emotional and social problems have taken the highest rank among mental illnesses. The present study aimed to provide a causal model for predicting children’s psychosocial problems based on parenting styles with an emphasis on the mediating role of social support.
Methods & Materials The present research was a cross-sectional analytic study. The study population included parents of children (under 5 years old with behavioral-emotional problems) referred to the comprehensive health centers services in Pardis City, Iran, in 2020. Of whom, 230 people were selected by convenience sampling method. Measurement tools included parenting styles, social support, and socioemotional problems questionnaires. Structural equation modeling with SmartPLS software was used to analyze the data. 
Ethical Considerations This study was approved by the Ethics Committee of Science and Research Branch, Islamic Azad University (Code: 99527).
Results The Mean±SD age of mothers was 32.87±7.87 years. Also, 60% of children were boys, and 40% were girls, with an Mean±SD age of 4.12±0.78 years. The Mean±SD scores of socioemotional problems, parenting styles, and social support were found to be 40.16±4.73, 152.23±18.10, and 34.66±6.49, respectively. The results of structural equation modeling showed that parenting styles had a significant role in predicting children’s socioemotional problems through social support mediation (P<0.05). Also, the fitting branches of the model showed the proper fit of the model through the composite reliability and the Cronbach alpha calculation. 
Conclusion The results of the present study emphasize the critical role of early childhood life and the need to focus on support facilities for mother-child couples at this age. Accordingly, providing psychological and supportive interventions for mothers with high stress can result in parental adjustment and mental health and, subsequently, the child’s normal development.