The invention relates to a laser head, comprising: a pumping source for emitting a continuous laser; a light-splitting device for splitting the continuous laser generated by the pumping source to two pulse-type pumping lasers; and two laser resonant cavities respectively for receiving the two pulse-type pumping lasers and alternatively outputting the pulse-type lasers. The laser head, which can radiate sufficiently, can reduce laser crystal thermal gradient and diminish thermal effect to the maximal extent in relation to continuous lasers, thereby enhancing photoelectric conversion efficiency and total output power of laser; two laser resonant cavities according to the invention are relatively complemented in time in the aspect of laser output, and relative to pulse-modulated lasers, the device according to the invention enhances the time utilization rate of the pumping source; and the device is low in cost, simple in operation and advantageous in large-scale production.