The current incidence of malignant tumors is increasing.Although we have been exploring the mechanism of tumor development and its treatment,its efficacy is little.Malignant tumor development mechanism is very complex,and a variety of proteins and genes involved.Connective tissue growth factor(CTGF,also known as CCN2)is a secreted protein,a member of the CCN family,which plays a very important role in the development and progression of tumors.This article summarizes the structure and function of CTGF /CCN2 protein,the mechanism of action in the development of malignant tumors and the latest research progress in targeted therapy.