Based on the seismic focal mechanism solution from years of 1970 to 2016 provided by the International Seismological Center (ISC),we performed stress tensor inversion in the subduction zone of the eastern Okhotsk micro-plate,and obtained the characteristics of tectonic stress field in the subduction zone of the Japan trench,the Kuril trench and the Kamchatka trench. The results show that:①The principal horizontal compressive stress axis in the shallow region (h<100km) of these trenches are consistent with the subduction orientation of the northwest Pacific plate and almost perpendicular to the direction of these trenches. In the trench area,the stress state on oceanic crust side is mainly tensile,while that on the continental crust is mainly compressive. Moreover,the tensile stress state exits in all post-arc regions. The region with a depth of 80~200km shows the "I" type tectonic stress field characteristics of the double seismic zone. ②The subduction zone in the Japan trench has a lower subduction dip angle (compared with the angles of Kuril trench and Kamchatka trench),and the subduction zone also extends farther in the horizontal direction toward the NWW,which leads a strong coupling between the oceanic plate and the overlying plate,and the large number of TF earthquakes. ③In deep the subduction zone (h>300km),the stress field of Kuril area shows non-uniformity,which may be caused by mantle resistance. The stress field of Kamchatka region (h>300km) is tensional,which may be due to the relatively stronger tensile drag of subduction plates.