The invention provides optical fiber sensing equipment detecting oil-water interface of a storage pot and relates to the technical field of oil field measuring. Oil-water liquid surface can be monitored in real-time and with accuracy by monitoring of various temperatures of different medium layers such as air, an oil layer, an emulsion layer and a water layer of the oil storage pot. The optical fiber sensing equipment detecting oil-water interface of the storage pot comprises a ripple pipe vertically disposed in the oil storage pot. The bottom of the ripple pipe is provided with a horizontal base seat; an armored temperature measuring optical fiber winds the ripple pipe; the armored temperature measuring optical fiber at least comprises two multi-mode temperature-sensing optical fibers backing up for each other; the optical fiber sensing equipment further comprises a temperature sensor and a distributing optical fiber host; and the temperature sensor is connected with the distributing optical fiber host via the multi-mode temperature-sensing optical fibers.