Hydrodynamic seal ring is based on the hydrodynamic effect of rotary shaft seal, Kalsi sealing ring is the typical type of products, and the design of sealing lip adopts unique waveform structure. Based on geometry analysis of the sealing ring, the 3D model of the ring was established by using SolidWorks software, and then the model was introduced into finite element software ANSYS, which was used to analyse stress for the Kalsi of rubber sealing ring. Through the analysis of the stress of rubber ring, the position of the maximum stress value of the rubber seal in hydrodynamic pressure was wave crest (valley) in the edge of the wave side. When the pressure of seal was 10MPa, the maximum value of stress of rubber sealing was up to 6.54MPa.