Objective To study laparoscopic microwave ablation (LWMA) in treating colorectal cancer liver metastases,and to evaluate its local efficacy and the factors influencing long-term survival.Methods A retrospective study was conducted on 24 patients with hepatic metastases after radical surgery of colorectal cancerin.These patients were treated with LWMA in Wenzhou People's Hospital from April 2012 to April 2017.The complete ablation,major complication,overall survival and disease-free survival rates were determined,and the factors influencing survival were analyzed.Results 71 tumor lesions in 24 patients were treated with LWMA.After the initial LWMA,complete tumor ablation was achieved in 70 lesions (98.6％).There were no serious adverse reactions and perioperative deaths.Conclusions LWMA had good short-term and long-term results.There were no serious adverse results.LWMA is an efficacious and safe treatment for patients with CRLM.