The　energy　dissipation　of　stress　wave　propagation　through　rock　masses　with　microdefects　and　macrojoint　considering　unloading　effects　was　investigated.　The　combined　effects　of　microdefects　and　macrojoints　with　different　unloading　and　loading　models　on　stress　wave　propagation　were　considered.　First,　the　transmission　properties　of　five　waveforms　of　incident　waves(rectangular　wave,　half-sinusoidal　wave,　triangular　wave,　left-triangular　wave　and　right-triangular　wave)propagating　through　the　rock　masses　with　microdefects　and　macrojoint　were　analyzed.　Then,　the　differences　in　the　energy　transmission　properties　of　stress　waves　propagating　through　rock　masses　with　microdefects　and　macrojoint　considering　unloading　effects　and　those　not　considering　unloading　effects　were　compared.　Finally,　the　effects　of　propagation　distance　and　incident　wave　amplitude　on　the　energy　transmission　coefficient　were　discussed.　The　effects　of　propagation　distance　and　incident　wave　amplitude　on　the　difference　of　energy　transmission　coefficient　with　and　without　considering　unloading　effect　were　further　revealed.　The　results　show　that　the　energy　transmission　coefficient　considering　unloading　effect　is　always　smaller　than　the　energy　transmission　coefficient　not　considering　unloading　effect.　In　addition,　the　energy　transmission　coefficient　of　the　rectangular　wave　is　the　largest　while　the　energy　transmission　coefficient　of　the　right-triangular　wave　is　the　smallest.　The　difference　of　energy　transmission　coefficient　of　the　rectangular　wave　is　the　smallest　whereas　the　difference　of　energy　transmission　coefficient　of　the　left-triangular　wave　is　the　largest.　The　energy　transmission　coefficient　decreases　with　the　increase　of　propagation　distance　but　increases　with　the　increase　of　incident　wave　amplitude.　The　difference　of　energy　transmission　coefficient　increases　with　the　increase　of　propagation　distance　and　decreases　with　the　increase　of　incident　wave　amplitude.　©　2022　Xi＇an　Jiaotong　University.　All　rights　reserved.