A local ring electrode piezoelectric actuator with the orthotropic elastic in plane is proposed in this paper. The effects of the center distance of the branch electrodes, the width of the branch electrodes and the angle of the electrode area on the orthotropic elastic of the piezoelectric actuator are studied. The results show that the local ring electrodes piezoelectric actuator has strong directivity and obvious orthotropic elastic in the plane. The performance of the electrode region of the ring electrodes piezoelectric actuator can be improved by reducing the center distance of the branch electrodes and increasing the width and the angle of the branch electrodes. When the center distance of the electrodes is 0.8 mm, the width of the electrodes is 0.4 mm, the thickness of the components is 0.5 mm and the loading voltage is 200 V, the transverse effect coefficient of the radial clamping stress of the local ring electrodes piezoelectric actuator can reach 45.60, and the radial free strain lateral effect coefficient can reach 1.82. The radial clamping stress of the electrode region of the local ring electrodes piezoelectric actuator can reach 2.46 kPa, and the radial free strain can reach 6.3×10-5. Therefore, the local ring electrode piezoelectric actuator can achieve high mechanical property in a specified direction.