The invention discloses a laser light source and a lighting device, the laser light source comprises a laser diode, a fluorescent sheet excited by the laser diode, a fixing plate for fixing the fluorescent sheet and fixing blocks, at least one fixing block is arranged on the fixing plate, the side edge of the fluorescent sheet is connected with the adjacent fixing block, and a heat-conducting medium is filled between the side edge of the fluorescent sheet and the adjacent fixing block. A light passing opening is formed in the fixing plate and covers the area, excited by the laser, of the fluorescent piece, and at least part of the area of the fluorescent piece abuts against the area, located on the edge of the light passing opening, of the fixing plate. According to the laser lighting device, the heat transfer distance is shortened through lateral heat conduction of the fluorescent piece, the heat transfer efficiency is improved, heat accumulation is reduced, the service life of the fluorescent piece is prolonged, and therefore the service life of the whole laser lighting device is prolonged. According to the laser lighting device, the heat transfer distance is shortened through lateral heat conduction of the fluorescent piece, the heat transfer efficiency is improved, heat accumulation is reduced, the service life of the fluorescent piece is prolonged, and therefore the service life of the whole laser lighting device is prolonged.