A structure system capable of achieving double-point hanging conversion and separation for a parachute includes a connection and separation mechanism (4), hanging slings (3), main parachute separationdevices (2), and dampers (1). Through reasonable configuration with a drag parachute cluster parachute system and a main parachute cluster parachute system, and under driving of an initiating explosive device, connection and separation of a drag parachute can be completed in a normal working mode, a main parachute bag is pulled out, connection and hanging conversion of a main parachute cluster parachute are performed, a heat-proof layer is pulled off, impact overload of the hanging conversion is reduced, and unlocking separation of the main parachute cluster parachute is completed; in addition, self-adaption of a work mode of single drag parachute failure of the drag parachute cluster parachute system can also be completed; under judgment of a control program, work modes of landing on water and ground are selected by the initiating explosive device; and a redundant unlocking device for the drag parachute enables the reliability to be improved. The system has the characteristics of large carrying capacity, multiple work modes, high reliability, and the like, and can be widely applied to occasions of connection and separation of cluster parachutes.