The tidal triggering of earthquakes refers to the phenomenon that the stress change caused by the tide triggers the earthquake. Because the study of the tidal triggering of earthquakes may provide valuable information on the conditions of fault rupture, it has attracted the persistent attention of researchers around the whole world. In this paper, the related research methods and results are briefly reviewed. In the early days, investigation on seismic tidal triggering focus mainly on finding tidal period in seismic activity. As the research goes further, the correlation between seismic activity and tides is tested strictly by statistical test method. Up to now, whether earthquakes are triggered by tides or not is still unanswered. However, some researches show that seismic activity in the focal area is often triggered by tides in several years before a strong earthquake. If it is confirmed, new clues will be provided for earthquake prediction.