The invention relates to a slide way type packer for step-by-step unpacking.A long slide way, a short slide way and a hook arm groove are formed in the outer wall of the lower portion of an upper central pipe.The short slide way is obliquely arranged and communicated with the long slide way to form a V shape.The hook arm groove is located beside the long slide way and communicated with the upper portion of the long slide way.A hook arm is arranged at the upper portion of an unpacking hook cylinder.The top of the hook arm is inserted in the hook arm groove.The top of a slide way pin is arranged in the short slide way and can slide in the long slide way and the short slide way.The slide way pin can drive the hook arm to slide together in the long slide way.By achieving hanging through a fixing pin and achieving unpacking through the slide ways, unpacking tensile force is low; when multiple packers are unpacked, step-by-step unpacking is adopted, and the problems that when packers are unpacked, pins need to be cut off, unpacking tensile force is large and it is not convenient to unpack the multiple packers are solved thoroughly.