Abstract: Objective To evaluated the efficacy of lentinan injection and carboplatin for malignant pleural effusions.Methods 63 patients were divided into the experimental group and control group.The experimental group were adminstered lentinan injection and carboplatin.Results The response rate of the experimental group was 81.2%,the control group was 61.3%.The better quality of life appeared in the experimental group.Conclusion Postoperative lentinan injection and carboplatin in formalignant pleural effusions is a beneficial therapeusis that helps to improve survival rates and qulity of life.