The invention discloses a disc type rotary cartridge which comprises bullet containing devices, a cartridge turnplate, a bullet supply mechanism and a transmission part. The multiple bullet containing devices are horizontally and uniformly distributed in the cartridge turnplate circumferentially in an array manner. The cartridge turnplate is connected with the transmission part. The bullet supply mechanism comprises a lever, a rocking bar, a cranked rod, a rack and a supporting plate. The cranked rod and the rocking bar are both arranged on the rack. A fulcrum is arranged in the middle of the lever. One end of the lever is connected with one end of the rocking bar. The fulcrum is connected with one end of the cranked rod. The supporting plate is arranged at the other end of the cranked rod and directly faces the center of the cartridge turnplate. The disc type rotary cartridge provided by the invention has rotating and supporting functions, the bullet containing devices can be stably clamped, rigid restraints are provided for the bullet containing devices, bullets and the bullet containing devices are not allowed to swing or move during rotation of the cartridge turnplate, and the disc type rotary cartridge is simple in overall structure and reliable in action.