We　report　a　simple　and　available　way　of　improving　the　reliability　of　high　power　InGaAs　980　nm　lasers　by　cleaning　the　facets　using　Ar　ion　before　the　protecting　films　have　been　coated.　The　Ar　cleaning　can　remove　the　impurity　and　the　oxide　on　the　air-cleaved　facets　of　laser　diodes.　It　is　proven　that　the　way　has　marked　effect　on　reducing　the　gradual　degradation　rate　of　laser　diodes　and　improving　the　catastrophic-optical-damage　threshold.