Objective To explore the role of parents in puberty sex education, consummate adolescence reproductive health, we designed the interventions to promote parents-teens communication on sexuality for the sake of physically and mentally healthy adolescence. Methods There are 550 grade-eight students and their parents take part in the intervention in Handan city, Hebei province. One group acts as control, while the other is experimental or intervention. Only parents in two group were performed different measures. All students may attend the lecture on the communication skills and own a book on AIDS knowledge. Only can the parents in the intervention group attended a lecture on communication skills & AIDS knowledge, own a guidance on talking sex to their teens and other activities. The effect of intervention was submitted by unitary variable and multi-variables analysis. Results The module can effectively improve children's value of points view. After intervention, less students in the experiment group agree with premarital sex, which compared with baseline investigation significant differently. The intervention spurred the parents up-grading the importance of communication between parents-teens. The parents demands more skills of puberty reproductive education and take more active part in sex topics with their teens. Parents' education, culture style and relative knowledge contributed much to the parents-teens communication in this study. Gender plays a special role in selecting partner to talk with in parents-teens sex topics. The emphasis should be laid on different contents in the light of different stage. Conclusion The core of parent-involvement school-based sex education module lies in enhancement parents-teens' communication, which can effectively trim teens' points view of value on sex. The module can raise parents' influence on the teens, however decrease peers' influence. The communication assignment and guidance books contribute a lot to the whole experiment. In a word, the module earn good reputation in field test, for which joins the efforts of parents and schools, succeed in outreach its influence into community.