A fast charger for button cell comprises a box body, a printing breadboard and a metal clip, wherein the printing breadboard is arranged in the box body; a transformer is arranged in one end of the box; A LBD and two metal clips are arranged upside the box face. A double harmonious self-exciting oscillation circuit is arranged on the printing breadboard. Currently, more and more electrical devices use the button cell, but no charger is provided to charge the button cell, therefore the utility model solves the problem of in availability of charger for button cell specially. The utility model has the advantages of fast speed charging, low cost and convenient production without expansion and explosion of the button cell.