Abstract： The loose media slope stability evaluation based on fuzzy analysis was proposed aimed at the difficulties in using the conventional methods to get its stability evaluation, because of the complex internal structure and affecting factors of the mountainous highway loose media slope. The loose media slope stability fuzzy AHP comprehensive evaluation was conducted based on J1 segment engineering examples of YaKang highway. The result shows that the method proposed is simple, reliable, and a scientific, which can provide a new reference for the engineering application.