The invention provides a general aviation flight plan management system which comprises a flight plan database, a plan period management module, a plan generation reporting and recording module, a plan data service module and a system operation module. The flight plan database keeps flight plan data, basic and dynamic information data and user and system information data; the plan period management module is connected with the flight plan data and the basic and dynamic information data from the plan data service module to realize management operation of the flight plan; the plan generation reporting and recording module is connected with the flight plan data and the basic and dynamic information data from the plan data service module, and generates and reports and records a real-time flight plan according to user requests; the plan data service module is connected with the flight plan data and the basic and dynamic information data from the flight plan database for the plan period management module and the plan generation reporting and recording module to call; and the system operation module determines operation authority of users according to the user and system information data in the flight plan database.