The utility model discloses a wavy resistor wire. The shape of the utility model is provided with at least one set of U and inverted U shapes which are connected end to end in a same plane. The length of the wavy resistor wire can be infinitely prolonged to two ends. The utility model also discloses a winder, which can conveniently and automatically wind the wavy resistor wire. The winder of the wavy resistor wire comprises a machine frame, a resistor wire conveying mechanism, a power source, a driving mechanism and a shaping mechanism, wherein the shaping mechanism comprises an inner shaping frame and an outer shaping frame; one end on the inner shaping frame is provided with a relative distance regulating device for thimbles which is provided with two fixed shafts; the thimbles are respectively sheathed on the shafts; springs are sheathed at the tail part of the thimbles; one end of the springs is connected with the relative distance regulating device for thimbles, and the other end is connected with the thimbles. The driving mechanism comprises a shifting mechanism and a tilting mechanism; the shifting mechanism contacts the two thimbles by periodicity; the tilting mechanism is fixedly connected with the outer shaping frame; the power source is connected with the driving mechanism.