OBJECTIVE:To study the clinical efficacy of domestic recombinant human granulocyte colony-stimulating factor (rhG-CSF) on reducing absolute value of white blood cells (WBC) and neutrophil (ANC) in cancer chemotherapy and radiotherapy and its adverse reactions.METHODS:Use of self-crossover,62 patients with malignant tumor were randomly divided into groups AB and BA.period A were treated with domestic rhG-CSF at 48 h after chemotherapy(treatment period) and chemotherapy alone was applied in the period B(control period).Group BA was directly opposite.Routine blood test was performed every other day and the changes of WBC and ANC were observed.RESULTS:Domestic rhG-CSF can improved chemotherapy-induced decline of WBC and ANC,recovery of WBC and ANC patients underwent chemotherapy,reduced duration of WBC and ANC decrease to guarantee progress of chemotherapy.The main adverse reactions represented as pain of injection site,skin rash,fever,muscle pain,weakness.CONCLUSION:The application of domestic rhG-CSF in cancer chemotherapy can effectively reduce the decline of WBC and ANC and shorten the recovery time of WBC and ANC to ensure the smooth progress of chemotherapy.