Objective:To study the effect of reconbinant growrh hormone(rGH) on the tumor cell proliferation in the transplantation liver tumor models in rats,to explore the advantages and disadvantages of rGH in the treatment of liver carcinoma.Methods : The male weaning rats were used to vaccinate and transgenerate by intraperitoneal injection of abdominal fluid contarning tumor cells from the celiar transplantation tumor rats, the others weaning rats were used to be the solid tumor rats by subcutaneous vaccination with abdominal fluid of tumor cells.The solid tumor were divided into pieces (2 mm×2 mm×3 mm),which were inserted into the liver of the 82 adult male rats to establish the transplantation liver tumor models.and then the models were divided into experimental group and control group randomly.After 3 days,experimental group were given rGH (0.5U／ kg·d)and control group were given via caudal vein NS for 5 days.All the rats were killed in 8d,10d,12d,respectively.The rats, tumors and livers were weighted,the number of hepatocytes,carcinoma cells and mitotic index were measured,the number of 3HTdR incorporation in vivo was measured in 8 days after operation. Results :There were no significant difference in all the results between the two groups,except the rat's weight of 8days after operation and the tumor weight in different phase.Conclusions :The rGH has no significant effect on the proliferation of tumor cell in transplantation liver models in rats.