The ages of the top and bottom laminae of a hiatus produced by sedimentary interruption are determined on the basis of synthecial dating of sedimentary cycle and lamina groups of stalagmite and synthecial determination of carbon and oxygen isotope of large stalagmite sections from the typical peak cluster and forest plain, the slope zone of karst and karst plateau in Xuanwei and Lugu lake of Yuannan, Libo and Duyuan of Guizhou and Guil-in. The age difference of the upper and lower laminae will be taked as the duration of the sedimentary inter-ruptin if there are more differences in the texture and structure the upper and lower laminae. The duration of sedimentatary interruption is long when the age difference is large and the dating values of the laminae (group) are in the normal order in this time period when there is intermittent water dropping. The duration is short when there are a little age difference. The sedimentation is continuous when there is little age difference and no visible anomaly. The sedimentary interruption of stalagmite contain rich information of paleoclimatic environ-ment and is one of the key field in the study of global climatic change.Based on the macroscopic, microscopic observation and dating of laminae, a classification scheme of sedi-mentary interruption on the seasonal, annual, 10 to 10 thousand-year and instant scales is put forward. The genetic and paleoclimatic implications of the sedimentation interruption are that, a short-time interruption of water dropping indicates a seasonal, annual or perennial dry condition under normal climate, a long-term inter-ruption of water dropping suggests periodical change of cold and warm climatic environment that result in sedi-mentary interruption of 10 years to 10 thousand years and an instant interruption of water dropping implies earthquake, falling top man-made events, etc.