The invention discloses a manufacturing method for a stacked iron core. The manufacturing method for the stacked iron core comprises the steps that multiple iron core pieces are punched in a machiningpiece one by one through a male die of a punching die, central holes, circular holes and/or through grooves, waste materials fixed in the circular holes or the through grooves in an interference fitmode and buckling points on the waste materials are formed in the iron core pieces while the iron core pieces are punched, and the through grooves are located in the inner side walls of the central holes or the outer circumferential sides of the iron core pieces; the multiple iron core pieces with the waste materials are stacked and then riveted through the buckling points, and the stacked iron core is formed; the waste materials in the through grooves are radially pushed to be radially separated from the through grooves; and a plurality of pits are formed in the inner side walls of the circular holes through punching in the step 1, a plurality of grooves and a plurality of convex blocks are formed in the outer circumferential walls of the waste materials in the circular holes, the end side faces of the convex blocks are closely attached to the inner side walls of the circular holes, and after the waste materials in the punched circular holes are rotated or radially pushed, the waste materials in the circular holes are in a suspended state and automatically fall to be separated from the circular holes. According to the method, the using performance is better, and the stacked iron core is perfect after being formed.