A　combined-wave　method　which　can　significantly　reduce　the　length　of　the　rock　bar　was　proposed　for　investigating　the　stress　wave　propagation　through　micro-defected　rock　mass.　A　series　of　short-bar　pendulum　impact　tests　were　carried　out　to　obtain　the　combined　waves.　Subsequently,　wave　propagation　coefficients　(e.g.　the　attenuation　coefficient　and　wave　number)　were　derived　based　on　the　present　combined-wave　method.　Finally,　the　present　combined-wave　method　was　validated　using　the　traditional　separated-wave　method　based　on　a　series　of　long-bar　pendulum　impact　tests.　The　results　show　that　the　wave　propagation　coefficients　obtained　by　the　present　combined-wave　method　using　a　0.6　m　bar　agree　well　with　those　obtained　by　the　traditional　separated-wave　method　using　a　1.2　m　bar.　The　present　combined-wave　method　overcomes　the　disadvantage　of　the　traditional　separated-wave　method,　which　requires　a　long　bar　to　prevent　wave　superposition.　A　series　of　short-bar　pendulum　impact　tests　were　conducted.A　combined-wave　method　based　on　short-bar　pendulum　impact　tests　was　proposed.The　present　combined-wave　method　was　validated.Wave　propagation　coefficient　can　be　determined　by　the　present　method　efficiently.