The invention discloses a task planning common platform based on a satellite-ground resource model. Through the configuration of the satellite-ground resource model, the platform is suitable for the type, the characteristics, the working mode and the use constraints of each satellite; for a specific business rule and a satellite use constraint, a special plugin is expanded through the personalized customization of a contract plugin interface; and through the integration of a universal plugin and the special plugin as well as the custom expansion of a personalized application, various types of task planning application software which meet each application type and each satellite use requirement are created, functions that multi-satellite joint planning is carried out, each satellite observation task is subjected to optimal distribution and observation mode optimization, each receiving resource task is subjected to optimal distribution and the like are realized, intersatellite task conflicts, satellite sensor task conflicts and data receiving conflicts are eliminated, a task planning scheme is generated, and visual deduction display is carried out. By use of the platform, a "platform+plugin" technology implementation way is adopted to realize task planning generality basic functions and frame functions, and exhibits high universality, adaptation and expandability.