This research was conducted with the aim of investigating the effect of preschool education on the learning of psychological skills of primary school students. The current research is a post-event research (ali-comparative). In this research, two groups of first, second and third grade students are selected and research tools are implemented on them. One group is those who have completed pre-primary education in kindergarten or preparatory school, and the second group has no formal education before primary school. The statistical population includes all students of the first, second and third years of primary school in Zanjan who are studying in the academic year of 1402-1403. The sample group includes 320 boys and girls, 160 of whom have preschool experience and 160 who have no preschool experience. The sampling method is stratified random. The tool for collecting information in this research was the Lincoln-Ezeretsky motor skills test. Two methods were used to test and analyze the data. In the descriptive method, the frequency and percentage of subjects' gender and the mean and standard deviation of research variables have been used in two groups. Pearson's correlation method was used in the inferential method. The results of this research showed that preschool education did not cause significant changes in the mental-motor skills of students. Also, there is no significant difference between trained boys and girls in mental-motor skills. Likewise, the results showed that there is a significant difference between untrained boys and girls in psychomotor skills.