The effects of the sliding-frequency guiding filters on reducing soliton phase jitter were theoretically studied by perturbation theory.The results show that the soliton phase jitter induced by spontaneous emission noise of amplifier increases only linearly as the propagation distance cube in the absence of control when the sliding-frequency guiding filters are used;The use of up-sliding is more preferable than down-sliding when the center frequency of filter is linearly sliding with distance along the fiber.