According　to　the　structural　damage　characteristics　of　ballastless　track　of　high-speed　railway　by　investigation,　a　novel　method　for　evaluating　the　influence　of　ballastless　track　of　high-speed　railway　is　presented.　The　dynamic　model　of　ballastless　track　with　damage　property　is　established　based　on　train-track　spatial　vibration　system.　The　calculated　and　in　situ　tested　results　were　compared　to　certify　the　model　and　computation　program.　Taking　the　track　slab　imperfections　occurred　in　a　tunnel　along　the　real　high-speed　railway　as　an　example,　the　influence　of　vibration　responses　of　the　train-track　system　with　slab　imperfections　under　different　conditions　is　calculated　and　analyzed　in　comparison　with　normal　slab.　In　addition,　the　maintenance　effect　on　the　repaired　track　structure　is　evaluated　by　considering　the　operate　safety　and　comfort　of　high-speed　train.　It　is　concluded　that　large　amplitude　of　slab　arch　imperfection　results　in　higher　acceleration　of　slab　and　car　body.　Therefore,　train　operation　speed　should　be　controlled　in　accordance　with　the　safety　standard　such　as　wheel　load　reduction　rate　and　derailment　coefficient.　In　the　case　of　low　amplitude　of　slab　arch　imperfection,　train　operation　speed　should　be　controlled　in　accordance　with　the　comfort　standard　such　as　Sperling　index.　The　specific　operation　velocities　were　given　correspondingly.　Therefore,　the　mechanism　and　conclusions　above　can　forecast　intuitively　in　the　field　of　track　maintenance.　The　paper　proposes　a　practical　and　valuable　method　for　evaluating　double-block　ballastless　track　of　highspeed　railway.