The article developed an automatic ammunition feeder for training artillery. By analyzing the implementation function and motion analysis of the actual gun automatic ammunition feeder, a lightweight simulated ammunition feeder for training and visiting was designed based on SolidWorks. This greatly simplifies the design, reduces material quality, and is equipped with a corresponding control system. The STM32 microcontroller controls the stepper motor and cylinder to complete the specified action, and sensors such as encoders and travel switches are added to achieve closed-loop control of the control system"s execution components. It has been verified that the design can complete the predetermined action and has good application prospects in training and visiting.