The invention discloses a multi-jig rotation alternate structure for a medical bag. The structure comprises an underframe which is provided with a transmission brake motor, a clearance divider base, a driven chain wheel rotation seat and a backing strip support pillar, wherein the clearance divider base is connected with a divider; the divider is connected with a driving power chain wheel; the driven chain wheel rotation seat is connected with a driven chain wheel; double-row chains are connected between the driving power chain wheel and the driven chain wheel; a jig lower backing strip is arranged on the periphery of the double-row chains and is supported by the backing strip support pillar; the double-row chains are connected with multiple jigs; and one end of each jig is connected with the jig lower backing strip. In the invention, due to the special jig design, high conductivity is obtained; free rotation is driven by the precise divider, so that good positioning guide is realized and a conductive core can freely move up and down and left and right; and based on the structure, intensive multiple functions of tube penetrating, tube melting and tube retreating can be finished at the same time, thereby realizing higher efficiency and better stability.