The invention relates to a small-type quick cable lifter of inner cavity of a tubular column working with pressure. A locking main body and a pressing cap are connected in a threaded mode, a lifting ring is arranged on the pressing cap, a compression screw penetrates through the pressing cap, extends into the pressing cap and is clamped to a limiting step at the upper ends of two half-cone bodies,locking cone body is formed by closing the two half-cone bodies, the conical surface of the locking cone body is attached with the inner cavity of the locking main body, the limiting step is arrangedat the upper ends of the half-cone bodies, the inner sides of the half-cone bodies are provided with oppositely-combined half-round grooves, an upper cable inserted groove, a lower cable inserted groove and notch grooves are formed in the side surface of the pressing cap and the side surface of the locking main body, the bottom of the inserted groove is aligned with the oppositely-combined position of the two half-cone bodies and the two half-round grooves, in use, a cable is inserted into the locking main body from the lower inserted groove, and is clamped by the half-round grooves of the two half-cone bodies, the cable is put into from upward and is compressed, the pressing cap and the locking main body are tihgtened through a wrench, then the upper inserted groove is inserted into thepressing cap, and namely, the cable is clamped. According to the small-type quick cable lifter, the structure is simple, using is fast and convenient, safety and reliability are achieved, damage on the cable is avoided, the size is small, the cable lifter is used for lifting the cable in the tubular column with the pressure, and operating time is long.