A　novel　space-time　generalized　finite　difference　method　based　on　the　direct　space-time　discretization　technique　is　developed　for　solving　dynamic　coupled　thermoelasticity　problems.　By　considering　the　time　scale　as　an　additional　space　dimension,　the　spatial　and　temporal　domains　are　simultaneously　discretized.　In　our　numerical　implementation,　the　velocity　is　introduced　as　an　additional　unknown　field　quantity　for　dealing　with　the　inertia　item　appearing　in　elastodynamic　equations.　Some　dynamic　coupled　thermoelasticity　problems　in　homogeneous　or　heterogeneous　plates　under　different　loading　cases　are　numerically　analyzed　by　this　method.　The　accuracy　of　the　present　method　is　verified　by　comparison　with　analytical　solutions　or　other　numerical　results.