The invention relates to a kind of method of using fibre-optical array energy source for laser firing and quick forming and the device. The invention has not the disadvantages of current laser, such as only being suited to small piece and having low working efficiency. The invention uses a fibre-optical array, which is constituted of several high power semi conduct laser machine and fibre-optical lines, and forms a spiccato laser beam on the work surface with lenticule array. The above two fibre-optical arrays are sited oppositely, and send out two same conterminous laser beams and then form a consecutive beam. Controlling the beam length and the gap place with computer can frit complicated pattern. The invention includes several high power semi conduct laser machine and lenticule array, coupler, miniature model V fibre-optical seat, fibre-optical.