The invention discloses ammunition carrying equipment with a stepless tray adjusting structure. The ammunition carrying equipment comprises a main frame, trays and packing nuts; the main frame is provided with support rods of an inverted-U-shaped structure and a full thread structure; the trays stretch into the main frame from the bottom end of the main frame and are installed on the support rods of the main frame in a sleeving mode; the packing nuts used for fixing the trays are installed on the support rods of the main frame in a sleeving mode. The tray positions can be correspondingly adjusted to meet the carrying requirements according to the different heights of carrying cartridges. The ammunition carrying equipment is simple in structure, easy and convenient to operate, easy to maintain, safe and reliable.