Faultblock tectonics concerns different aspects of earthquake activity as follows∶1)Most earthquakes with magnitudes over 6 occurr along the boundaries of different faultblocks based on the catalogues of Chinese earthquakes. The faultblocks control the distribution of earthquakes； 2)Characteristics of earthquakes is contained in the whole movement of blocks. For example，the active and quiescent periods of basin belts around the Ordos faultblock are different each other，and there was no obvious periodicity. However，if we regard the Ordos block as a whole，the seismicity around the Ordos block shows quasiperiodicity in some extent. 3)Block movement is accommodated by alternating slip of faults around the block. Based on the time interval and styles of unstable events occurred on the block boundary faults，their interaction may be divided into different types：alternating type of strong earthquakes and alternating type by a strong earthquake with weak earthquakes or aseismic slip. The former may be divided into long time interval and short time interval in addition. The alternating type of strong earthquakes with short time interval or type of double main shock has been taken noticed earlier. The alternating type of strong earthquakes with long time interval is not easy to recognize，fortunately，some examples are distinguished benefit from the Chinese earthquake record，for example，three alternating active periods of earthquakes on Shanxi and Weihe boundary faults of Ordos block. Alternating type by a strong earthquake with weak earthquakes or aseismic slip is difficult to identify，it can be observed only in the area with dense observational network and high resolution apparatus such as the Beijing area； 4)Characteristics of alternating slip of faults on the boundary of blocks is discussed based on the experimental results. Besides，some other earthquake phenomena are also discussed by faultblock tectonics.