The purpose of this study was to examine the influence of martial relationship and parenting style on children’s problem and prosocial behaviors in China. A total of 165 mothers (mean age, 32.33) with children aged 3–6 years (mean, 4.56) completed an online questionnaire to assess their marital relationship and children’s problem behaviors. The mothers’ responses measured their marital relationship, parenting style, and children’s problem and prosocial behaviors. Structural equation modeling showed that the marital relationship mediates parenting style and influences children’s problem and prosocial behaviors. In addition, a mediation analysis was conducted based on the results of the structural equation modeling. Marital conflict was found to influence children’s problem behaviors through the mediation of authoritarian and permissive parenting styles. Marital support was found to influence children’s problem behaviors through the mediation of authoritative parenting style. Both marital conflict and marital support were found to influence children’s problem and prosocial behaviors through the mediation of parenting styles. In sum, these results suggest that the marital relationship not only influences children’s problem and prosocial behaviors, it also influences children’s problem behaviors through the mediation of parenting style.