Abstract The traditional and non-traditional security issues have become the national security threat. Since the reform and opening up of the mainland China whom has improved its national comprehensive strength, but it also need to face many national security challenges, therefore PLA should have the ability to execute the variety military tasks, war military operations and military operations other than war military operations.“Winning local wars under conditions of information technology capabilities"and“military operations other than war capabilities"are the important parts of PLA's“ability to execute the variety military tasks". The political work as PLA's“lifeline"should keep abreast of the times, improve and innovate the methods, and continue the service and war operational functions for together to accomplish the variety military tasks.