Supply system suitable for high-expansion fluid

The utility model discloses a replenishment system suitable for high-multiple fluid, which comprises an absorption tower, a feed port of the absorption tower is connected with a feed pipeline, the feed pipeline is connected with a feed bypass pipeline in parallel, and two ends of the feed bypass pipeline are respectively communicated with a feed port and a discharge port of a first gate valve on the feed pipeline. A sampling steel cylinder is arranged on the feeding bypass pipeline, a first stop valve and a second gate valve are sequentially arranged between a feeding port of the sampling steel cylinder and a feeding port of the first gate valve, and a drain valve, a second stop valve and a third gate valve are sequentially arranged between a discharging port of the sampling steel cylinder and a discharging port of the first gate valve. An original huge filling system is completely replaced, material loss and machine pump faults in the adding process are avoided, working efficiency is improved, manpower, mate