An　all-over　breathing　crack　on　the　plate　surface　having　arbitrary　depth　and　location　is　assumed　to　be　nonpropagating　and　parallel　to　one　side　of　the　plate.　Based　on　a　piecewise　model,　the　nonlinear　dynamic　behaviors　of　thin　plate　with　the　all-over　breathing　crack　are　studied　to　analyze　the　effect　of　external　excitation　amplitudes　and　frequencies　on　cracked　plate　with　different　crack　parameters　(crack　depth　and　crack　location).　Firstly,　the　mode　shape　functions　of　cracked　thin　plate　are　obtained　by　using　the　simply　supported　boundary　conditions　and　the　boundary　conditions　along　the　crack　line.　Then,　natural　frequencies　and　mode　functions　of　the　cracked　plate　are　calculated,　which　are　assessed　with　FEM　results.　The　stress　functions　of　thin　plate　with　large　deflection　are　obtained　by　the　equations　of　compatibility　in　the　status　of　opening　and　closing　of　crack,　respectively.　To　compare　with　the　effect　of　breathing　crack　on　the　plate,　the　nonlinear　dynamic　responses　of　open-crack　plate　and　intact　plate　are　analyzed　too.　Lastly,　the　waveforms,　bifurcation　diagrams,　and　phase　portraits　of　the　model　are　gained　by　the　Runge-Kutta　method.　It　is　found　that　complex　nonlinear　dynamic　behaviors,　such　as　quasi-periodic　motion,　bifurcation,　and　chaotic　motion,　appear　in　the　breathing　crack　plate.