An integrated miniaturized portable entanglement source with high-brightness and high-stability has been designed using quasi-phase matching and Sagnac loop structure. Based on parametric down conversion process of PPKTP crystal, the entanglement source has the brightness of 13.8Mcps, the polarization contrast better than 98%, the tangle of 0.9357, and the jitter of counts rate caused by temperature variation and mechanical vibration less than 5%. The system has been successfully and effectively applied to the field test of 100km quantum entanglement distribution and lower-limit measurement of association speed under continuous running, which provides a good trial basis for further realizing the spatial entanglement source load.