In order to meet the requirements of continuous measurement of ship-borne towed fully fiber optic marine temperature-depth profile,FBG pressure sensor measuring seawater depth uses FBG temperature sensor as its temperature compensation sensor.Because both of them are sensitive to temperature and have different respond time to seawater temperature,there are some deviations in testing seawater pressure.Aiming at this problem,the temperature response consistency of sensors is analyzed.Through installing thermal insulation material for outer tube of FBG temperature sensor,thus,the temperature response time of FBG temperature sensor and pressure sensor is almost consistent.Finally,through the sea trial verification,FBG pressure sensor and standard sensor ALEC have higher measurement consistency.