Dividing the mainland China into different tectonic stress regions,we calculate tidal stress components along the seismic compressive and extensional principal stress axes at every earthquake’s focus in different tectonic stress regions.Tidal stress triggering effect on every earthquake fault is analyzed.Based on this,the lunar-solar location parameters on the occurring times of earthquakes which suffered tidal triggering effects are calculated,and the distribution patterns of the lunar-solar location parameters in different tectonic stress regions are obtained.The results indicate that earthquake tidal triggering effects and related astronomical characteristics are dependent on the properties of regional tectonic stress and the geographic locations of earthquake faults. Dividing the mainland China into different tectonic stress regions, we calculate tidal stress components along the seismic compressive and extensional principal stress axes at every earthquake’s focus in different tectonic stress regions. Tidal stress triggering effect on every earthquake fault is analyzed. lunar-solar location parameters on the occurring times of earthquakes which suffered tidal triggering effects are calculated, and the distribution patterns of the lunar-solar location parameters in different tectonic stress regions are. the results that results that earthquake tidal triggering effects and related astronomical characteristics are dependent on the properties of regional tectonic stress and the geographic locations of earthquake faults.