OBJECTIVE： To investigate the role of clinical pharmacists on drug therapy for a chemotherapy patient with drug-induced liver injury （DILI）. METHODS： Clinical pharmacists participated in the therapy for a patient with colorectal cancer and suggested that ondansetron+metoclopramide+promethazine were given before chemotherapy for stopping vomiting because chemotherapy drugs might lead to gastrointestinal reaction. The patient suffered from DILI before second chemotherapy. According to the history of drug use and the characteristics of drug effects， clinical pharmacists estimated that DILI may be related to Chinese patent medicine （Guben yichang tablets） and TCM formula granules taken during the two chemotherapy periods. Clinical pharmacists recommended Polyene phosphatidylcholine injection 465 mg， ivgtt， qd+Reduced glutathione for injection 1 g， ivgtt， qd for protecting liver tissue， and additionally recommended Compound glycyrrhizin injection 60 mL， ivgtt， qd for inhibiting inflammation and regulating immune function. After liver function of the patient had been recovered， it was suggested to stop polyene phosphatidylcholine， reduced glutathione and compound glycyrrhizin， etc. Pharmaceutical care was also provided， including efficacy evaluation， ADR monitoring， medication education， telephone follow-up， etc. RESULTS： The physicians adopted the suggestions of clinical pharmacists. The liver function indexes of the patient recovered to normal， and then completed chemotherapy smoothly for 3 times. CONCLUSIONS： When tumor patients suffer from DILI during chemotherapy， clinical pharmacists should help physicians find and judge the drug factors leading to DILI based on the history of drug use and the characteristics of drug effects， and assist physicians to formulate and adjust medication plan so as to relieve the degree of DILI and guarantee the smooth development of chemotherapy.