Study on Compatibility of Fiber Optical Sensor in Construct of Concrete Liang Lei Jiang Desheng Sun DongyaOn the basis of the theory analysis and research, the paper that involves the compatibility between a fiber optical sensor and a concrete construct of civil engineering brings forward a series of method improving the compatibility, and a novel fiber optical sensor is developed. The experiments about it show that the novel construct of fiber optical sensor and the scheme of the protecting layer of epoxy resin bed composite not only make that the sensor is very suitable for the bad construct environment, but also bring to effect to monitoring the beginning, propagation and breaking of concrete cracks. The results also indicate that the sensor is not failure at large deformation, has a high compatibility with concrete construct and can be used in actual engineering.fiber optical Sensor; concrete construct; compatibility Liang Lei: Lect., Fiber Optical Sensing Engineering Research Center, WUT, Wuhan 430070, China.