The invention discloses a convenient to adjust ultraviolet curing light source which comprises a mainframe box, wherein a lift-and-pull belt and a dustproof heat dissipation hole are fixedly mounted on the outer surface of the upper end of the mainframe box; the dustproof heat dissipation hole is formed in the front end of the lift-and-pull belt; a display screen is mounted on the outer surface, close to the upper end, of the front end of the mainframe box; an adjusting knob and a switch lock are mounted on the outer surface, close to the lower end, of the front end of the mainframe box; the switch lock is positioned below the adjusting knob; a base is fixedly mounted on the outer surface of the lower end of the mainframe box; and a ventilation opening is fixedly mounted on the outer surface of one side of the mainframe box. The convenient to adjust ultraviolet curing light source is provided with a dustproof fan, a spotlight panel and the lift-and-pull belt to remove internal fallen dust and effectively aggregate ultraviolet light so as to prevent light diffusion; and the convenient to adjust ultraviolet curing light source facilitates carrying of a light source, is suitable for different working conditions and brings about better using prospect.