The invention provides a cradle type storage conveyor. The cradle type storage conveyor includes a rack, a chain wheel position region, a lower position region, an upper position region, a motor, a main metal plate, and a transmission shaft; chain plates are arranged on an inner side of a guide metal plate; L-shaped supporting metal plates are arranged on the chain plates; axial long-bar-shaped holes are formed in the chain plates; chain plate connectors are arranged on two sides of the chain plates; the chain plate connectors are used for fixedly connecting the chain plates and attaching plate connectors; a round hole is formed in each of folded edges at two ends of the chain plates; outer cylindrical surfaces of key-free bushings and the round holes are connected through a clearance fit;the chain plates, the L-shaped supporting metal plates, rotation shafts, the chain plate connectors, the key-free bushings, second bearings with seats and shaft clamping springs form an accompanyingtooling. The beneficial effects of the invention are that on the basis of the action of gravity of a work piece, the design demand of the accompanying tooling in the chain wheel position area can be met by designing and calculating a geometrical relation between the center of gravity and the rotation axis of the accompanying tooling; and a simple structure of the accompanying tooling can be achieved through the key-free bushings.