Cable fixing device for electric power tunnel

The utility model discloses a cable fixing device for an electric power tunnel, which comprises a base, a left side plate and a right side plate are respectively arranged at two ends of the base, anda left clamping block, a middle clamping block group and a right clamping block are arranged between the left side plate and the right side plate; a limiting sliding groove is formed in the base, theleft clamping block, the middle clamping block set and the right clamping block are each provided with a limiting sliding block matched with the limiting sliding groove, and extension springs are arranged between the limiting sliding block of the left clamping block and the limiting sliding block of the middle clamping block set and between the limiting sliding block of the middle clamping block set and the limiting sliding block of the right clamping block. The left side plate and the right side plate are each provided with a locking mechanism, the locking mechanism of the left side plate ismatched with the left clamp