The invention discloses a metal spraying device for a film capacitor. The metal spraying device comprises a rotary disc, rotary bases, a friction part and a metal spraying machine, wherein the rotarydisc performs auto-rotation around a central shaft; the rotary bases are uniformly distributed on the peripheral edge of the rotary disc in a spaced mode; the bottoms of the rotary bases are rotatablyconnected to the rotary disc through bearings; an accommodating slot for a winding element is formed in the top of each rotary base; the friction part is fixedly mounted at the peripheral outer sideof the rotary disc; the friction surface of the friction part is in contact with the side walls of the rotary bases for rotating the rotary bases through static friction force; the metal spraying machine is suspended and fixedly mounted above the rotary disc; and the metal spraying width, on the end surface of the winding element, of the metal spraying machine is smaller than the end face diameterof the winding element. The metal spraying device can meet rotation of the winding element to accomplish metal spraying, reduces waste of metal powder, greatly increases the number of winding elements to be subjected to metal spraying, improves general metal spraying efficiency, is simple in structure, is rapid and convenient to control, is low in manufacturing cost, and facilitates repair and maintenance.