The invention provides a method that manufactures a plurality of coil in series connection to insulate from a middle coil to a coil drawing rapidly, easily and determinately, comprising steps of: inserting an insulating jacket tube into electronic wires to surround a coil surrounding mould in a predetermine manner; the electronic wires passing through the jacket tube and the coil surrounding mould to form a first coil; covering from the jacket tube inserted in a predetermine manner to a winding end part of the first coil to form a first middle coil to the coil drawing; the electronic wires as start of winding after the first middle coil to the coil drawing, the electronic wires passing through the jacket tube and the coil surrounding mould to form a second coil; the electronic wires as start of winding after the second middle coil to the coil drawing, the electronic wires passing through the jacket tube and the coil surrounding mould to form a third coil; repeating the steps for predetermined times to form n coils (n is more than 2) having (n-1) middle coil to the coil drawing.