A multi-channel optical fiber Fabry-Perot demodulation system based on non-scanning correlation demodulation combining with white light interfered Fabry-Perot sensor is designed. Utilizing cylindrical lens collecting and focusing light as linear light spot and get equivalent inverted image at 2 times focal length plane, the corresponding optical model is set up; the optical characteristic analysis and parameter optimization is carried on; and the optical system and embedded demodulation system is designed. A Butterworth filter is used to filter out the background noise on the correlation signal effectively. Experiments based on the prototype demodulator show that the stability is up to 7 nm, at the measuring range of 10~40 μm, with the resolution of 8nm. The experimental results indicate that the system can achieve real-time measurement, high measurement accuracy, stability and consistency, and can realize multi-point detection and improve the multiplexing capacity.