Objective:To explore the efficacy and safety of individualized selection of chemotherapy drug guided by excision repair cross complement group1(ERCC1),ribonucleotide reduc tase 1(RRM1) and tubulin beta 3(TUBB3) in patients with advanced non-small cell lung cancer(NSCLC). Methods:Totally 47 cases of advanced NSCLC were divided into individualized chemotherapy treat-ment group(group A) and control group(group B) according to histopathological tissue sufficient or not. In group A,mRNA levels of ERCC1,RRM1 and TUBB3 were measured by branched DNA-liquid chip technique and chemotherapy regimen was formulated ac-cording to the measured results. Group B were treated by gemcitabine plus cisplatin. Results:Effective rate of group A was 63.2%,significantly higher than that of group B(P<0.05). Disease control rates of group A and group B were 78.9% and 50.0% respectively(P<0.05). Effective rate was significantly higher in patients treated by gemcitabine plus cisplatin in group A than in patients received the same treatment in group B. Quality of life in both groups was improved significantly after treatment(P<0.05) than before treat-ment,but there was no significant difference in improvement rate(P >0.05). There was no difference in adverse reactions between both groups and all patients were well tolerated. Conclusions:Determination of mRNA levels of ERCC1,RRM1 and TUBB3 by branched DNA-liquid chip technique can guide individualized chemotherapy for advanced NSCLC and significantly improve chemotherapy efficiency; however,further exploration of more effective individualized treatment plan is needed.