Based on evidence practice theory, through the system search for the literatures till October of 2016 collected in Chinese Database such as CNKI, VIP and so on as well as published 31 literatures, by using qualitative research method of generalization description, this paper systematically studies and analyzes the causes for sexual assault of female minors, discusses the causes from such five perspectives as society, schools, family, assaulters and victims and finally points out the deficiencies in present researches and future research direction.