Lasers demonstrate characteristics of high brightness and good monochromaticity. Moreover, the cost of liquid crystal display (LCD) planes are low as they have been developed extensively. Because of their excellent display performance, laser LCD televisions (TVs), which use lasers as their backlight, demonstrate strong market competitiveness and extensive market potential. The use of a light source array is a common technique for backlight system design. To limit the high power supplied by a single laser diode to an array, this study designed a scanning beam splitting system that divided the high-power laser beam into multiple sub-beams with sufficient power to provide a laser backlight for LCD TVs. The collimated laser beam in this system was initially scanned in two dimensions by a galvanometer scanner and then made to converge into a narrow linear beam by a convex lens and a cylinder lens; finally, it was coupled into an optical multimode fiber array. Thus, beam splitting was achieved. In addition, based on the scanning mirror and multimode fibers, the system also exhibited a speckle reduction effect. The experimental results demonstrated that the coefficient of variation in the average output power of 11 fibers is 16%, with an average value of 674.13 μW, and their average speckle contrast is 0.162.