Aim To research the use of floating technique on the heavy machine gun and design the parameters of the floating machine. Methods Use single target optimum method. Results A group of parameters for the floating mechanism is obtained and the performance of the designed heavy machine gun is analyze which is agreed with the expectation. Conclusion The floating technique can be well utilized on the heavy machine gun. By matching the parameters not only the recoil force is greatly reduce

but also a good floating stability is obtaired. It is useful for improving fire precision.