A resonant-type integrated optical waveguide accelerometer of cantilever beam structure is composed of an input waveguide, a Mach-Zehnder interferometer of unsymmetrical structure, a micro-mechanical vibration cantilever beam, a curved waveguide, an output waveguide, characterized in that: all the waveguide structures and the cantilever beam use the integrated optical micromachining technique andthe device single-scale integration can be realized by using the temperature-insensitive organic polymer optical waveguide structure and the organic polymer substrate and the key technique indexes such as detection sensitivity, dynamic range are extensively adjusted and the accelerometer is free from the effect of the ambient temperature disturbance and wave-guide birefringence. The accelerometerhas features of compactness, light weight, high stability, simple preparation technique and mass production and obvious reduced device cost.