Earthquake and its resultant tsunami, as a kind of disaster events in geological history, may be recorded as event deposits of seismite and tsunamite. Typical characteristics of seismite and tsunamite, including seismo-fracture bed, synsedimentary microfracture, micro-corrugated lamination, molar tooth structure, hummocky bedding etc, occurs in Mesoproterozoic Dalongkou Formation in central Yunnan Province. Three types of sedimentary units have been recognized: seismite (unit-A, including limestone with molar tooth structure, seismic shattering rock, seismic corrugated rock, autoclastic breccia and intraclastic parabreccia), tsunamite (unit-B, intraclastic limestone with hummocky bedding or parallel bedding) and background deposits (unit- C). Various stacking of these units constructs three distinct sedimentary sequences::A-B-C、A-C、B-C. The sequence A-B-C represents an event sedimentary sequence of earthquake-tsunami-background deposits. The sequence A-C represents the sequence of earthquake and background deposits (no tsunami occurring). The sequence B-C represents the sequence of tsunami and background deposits (far from the center of earthquake). As the central Yunnan province was located in a tectonic setting of rift basin in Mesoproterozoic era, the earthquake event deposits of Dalongkou Formation are sedimentary response to tectonic activity of the rift basin.