Combined firework mud bottom forming device

A combined firework mud bottom forming device relates to the field of combined firework production and comprises a fixing frame, a fixing part is arranged on the fixing frame, an inserting plate and a feeding and discharging box are installed on the fixing part, and rotating boxes are fixed to the front side face, the rear side face, the left side face and the right side face of the fixing part respectively. According to the utility model, a plurality of combined firework cylinders are placed in each of not less than four rotating boxes, so that the mud bottom sealing operation can be carried out on the combined fireworks through one-time operation, the processing efficiency is high, the feeding and discharging box is moved by the feeding and discharging box and the operating rod to move the combined firework cylinders in batches to realize feeding and discharging, the feeding and discharging operation is easy, and the efficiency is high; and the combined firework cylinders are inserted into the uniformly coa