Manufacturing method of amorphous iron core

The invention provides a manufacturing method of amorphous iron core. The manufacturing method has the advantages that the iron core layer number is precise, the operability is high, and the work time is reduced. The amorphous iron core is prepared by laminating amorphous magnetic alloy strips. The manufacturing method comprises the following steps: configuring a plurality of amorphous magnetic alloy strips with opened ends on the external periphery of an inner core rod so as to produce a U-shaped iron core; placing the U-shaped iron core on a work bench, embedding a first frame on the iron core, covering two side parts and bottom of the iron core except for the opened ends by the first frame; folding the opened ends of the iron core so as to enclose the iron core; embedding a second frame on the first frame, covering the ends of the iron core by the second frame, and annealing the iron core.