A soft casingfood sterilizing machine, is suitable to sterilize for all model and specification, various shape soft casing can, fruit cup, syrup which weight is between 25 to 3000g. The machine includes frame, feeding mechanism, sterilization box, cooling box, hot water cycle device, cold water cycle device, the characteristics is that setting floating-proof device; the feeding mechanism transports material with net belt; the sterilization box and the cooling box is arranged with clapboard for locating holes; the floating-proof device connects drive transmission shaft to a second driven shaftthrough transmission chain, the second driven shaft connects with the main axis of the floating-proof through gear and to the driven shaft of the floating-proof through floating-proof chain, setting pressing board on the floating-proof chain, the pressing board is arranged with perforations. The present invention can be used widely, saves working time; can not damage packing surface during running; sterilization effect is good, energy as well as water saving; the whole structure is compact, the ground area occupied is small, space using efficiency is high, throughput is big.