To　obtain　the　reliable　growth　planning　curve　in　the　whole　process　of　reliability　growth　test,　reliability　growth　planning　technology　has　developed　and　become　an　important　part　of　the　reliability　growth　plan.　Reliability　growth　planning　models,　are　generally　used　to　describe　reliability　growth　plans　and　produce　growth　planning　curves.　It　is　found　that　two　widely　used　models,　CE　model　and　PM2　model,　can　produce　very　different　growth　planning　curves　even　under　the　same　input　conditions.　However,　there　are　few　papers　to　study　the　relationship　and　difference　of　these　two　models.　This　paper　gives　a　comparison　of　the　two　models　by　studying　on　the　relationships　between　the　parameters　of　two　models　and　the　corresponding　planning　curves,　considering　that　planning　models　are　always　influenced　by　their　intrinsic　parameters.　The　results　show　that,　CE　Model　can　correctly　reflect　the　effect　of　Fix　Effectiveness　Factor　and　Management　Strategy　change　on　growth　planning　curve.　In　contrast,　PM2　Model　can　not　correctly　reflect　the　effect　of　the　two　parameters　change　on　growth　planning　curve.　From　this　point　of　view,　the　CE　Model　seems　more　reasonable　and　acceptable　than　the　PM2　Model.　©　2019　IEEE.