Abstract： Recurrent implantation failure(RIF)is no clinical pregnancy after multiple multiple embryo transplantation.With the rapid development of the assisted reproductive technology(ART),its incidence is increasing,which has become a major chal-lenge in the field of assisted reproduction.It is noticed that RIF is closely related to intrauterine adhesions(IUA),and the trans-cervical resection of adhesions(TCRA)is the main treatment for the patients.However,the problems such as high re-adhesion rate and low implantation rate remain to be solved.Under the thought of"Qi transformation"and"uterine collateral theory",the tutor professor JIANG Lijuan analyzed the relationship of RIF,IUA and these theories.Guided by the method of harmonizing uter-ine collateral,professor JIANG applied the theory of"Qi transformation"throughout the whole process of clinical diagnosis and treatment,gained a good effect on the repair of damaged endometrium,significantly improved the endometrial receptivity and the clinical pregnancy rate.