As a key military weapon,helicopters are extremely vulnerable to various injuries when performing combat and disaster relief missions.War damage assessment and repair techniques are particularly important.This article delves into the types of helicopter casualties,including combat damage,environmental failures,improper handling,and wear and tear failures,and analyzes the threat of damage that helicopters can suffer in the air and on the ground.By elaborating on the damage mode of helicopters,this paper further proposes the methods of war damage assessment and repair,including the specific steps of war damage inspection,assessment and repair,and non-standard repair methods.These studies provide a scientific thinking and methodology for the wartime equipment support of the Chinese army,which has important practical reference significance for ensuring the efficient performance of helicopters in wartime or field environments.