The utility model discloses a disk sheet laser which comprises a disk sheet module and pumping source modules which are arranged on a bottom plate of a laser, wherein the pumping source modules are arranged at both sides of the disk sheet module in parallel, both ends of the laser are provided with a front and a back end covers, the upper part of the laser is provided with a cover plate, the disk sheet module comprises two disk sheets arranged in parallel, a gap between the two disk sheets forms an air cooling channel, a disk sheet support is arranged between the two parallel disk sheets, the upper part and the lower part of the disk sheets are provided with a bottom plate of the disk sheet and a top cover of the disk sheet, and two air taps of the disk sheet module are respectively arranged on the bottom plate of the disk sheet and the top cover of the disk sheet. The disk sheet laser of the utility model can sufficiently absorb the pumping light and improve the pumping efficiency of the laser. The cooling passage formed by the disk sheet itself can reduce the complexity of cooling. The utility model has low cost.