The invention discloses a laser welding head, and belongs to the technical field of laser remelting equipment. The laser welding head comprises a base plate, wherein a fixing block and a storage bin are installed on the base plate, the lateral wall of the fixing block is respectively provided with an air inlet and a feeding passage, a tin outlet nozzle is installed at the bottom of the fixing block, a laser device optical fiber head is installed at the top of the fixing block, a discharging through hole is formed in the bottom of the storage bin, the base plate is provided with a falling passage communicated with the feeding passage, a material dividing sliding block driven by a linear driving device is installed on the base plate in a sliding mode, and a positioning hole is formed in the material dividing sliding block. The invention further discloses a laser welding machine with the laser welding head. The laser welding head and the laser welding machine are simple and reliable in structure, small and exquisite in size, light in weight and low in cost. Nitrogen is blown in for protection at the same time of laser remelting welding, and welding point formation and appearance are good.