Laser focusing device and laser cutting head

The utility model relates to the technical field of laser cutting heads, and provides a laser focusing device and a laser cutting head, the laser focusing device comprises a motor arranged on one side of a motor fixing seat and a lens cone fixing seat arranged on the other side of the motor fixing seat, and a collimating lens cone is arranged on the lens cone fixing seat; an output shaft of the motor is provided with a first driving part, the lens cone fixing seat is fixedly provided with a second driving part matched with the first driving part, and when the first driving part is driven by the motor to rotate, the second driving part can be driven to drive the lens cone fixing seat to linearly move. According to the utility model, through the cooperation of the first driving member on the output shaft of the motor and the second driving member on the lens cone fixing seat, the collimating lens in the lens cone fixing seat can be driven to move in the vertical direction so as to adjust the distance from the l