Integrated surface plasmon resonance(SPR) waveguide sensing chip is a combo of surface plasmon resonance sense technology and micro-electronics fabrication technology. The work mechanism and basic structure of integrated SPR sensing chip are introduced. By combining a traditional waveguide mode solver with SPW dispersion equation,an effective waveguide SPR solver is developed. Through this method,the work state of the chip is modeled theoretically and the relationships among various characteristic parameters are provided. It is proved that this method is a powerful tool to analyze the SPR waveguide sensing chip.