A high-resolution laser display device. The device has a micro-cavity laser array which is formed by arrangement of a plurality of groups of RGB micro-cavity lasers, each group of RGB micro-cavity lasers consists of three micro-cavity lasers, a single light source is used as an excitation source to excite laser array to obtain RGB laser, a matched transmission type liquid crystal screen is utilized to perform color mixing on RGB pixel laser, thereby realizing gray scale control of an entire pixel, RGB micro-cavity emergent light is laser, the advantages of wide color gamut and high saturation degree of laser display are retained, and in the display device a display pixel is not projected and amplified, thereby facilitating realization of an image of high-definition image quality. In addition, since the micro-cavity lasers are mutually independent, and coherence stack of emergent light does not occur, a complex laser-speckle-eliminating device is no longer needed.