The invention relates to a flexible automatic production system for combined fireworks, which comprises an automatic tube rolling machine, a conveyer, a mud filling machine, a cake assembling and fuse inserting machine, a wrapping machine and a manipulator. The system is characterized in that firstly tubes are rolled through the automatic tube rolling machine and are stored in a tube storage basket, the tubes are fed to the mud filing machine for mud filling, cake assembling and fuse inserting after the tubes are dried, then the tubes are wrapped and reinforced by the wrapping machine, the tubes are righted and fed to the inlet port of the manipulator, propelling charges, effect part tubes, a first paper layer and a second paper layer are sequentially filled into the tubes after cake assembling, face paper and labels are stuck, products are boxed and sealed by a boxing and sealing machine and then the finished products are conveyed by the conveyer to a finished product warehouse; and materials among equipment of the entire system are conveyed by adopting the conveyer, and the loading position and the unloading position of each equipment are provided with photoelectrical conversion switches which are used for controlling the startup and the shutdown of the conveyer. Since the materials in the system are conveyed by the conveyer and the startup and shutdown of the conveyer are controlled by the photoelectric conversion switches, the materials are accurately conveyed in time, the product quality and the production efficiency are guaranteed, and the defects that manual handling in the past is time-consuming and labor-consuming and safety accidents are apt to occur are avoided.