The invention relates to an imagery measurement combined laser particle size analyzer and a measurement method thereof. The imagery measurement combined laser particle size analyzer comprises: a laser process measurement zone comprising a laser device, a laser process sample cell, a laser process lens, a laser process forward detector group and a laser process backward detector group; and an imagery measurement zone arranged below the laser process measurement zone and comprising an imagery CCD, an imagery sample cell and an imagery light source, wherein the imagery CCD and the imagery sample cell are arranged at the bottom of an original laser device; and the imagery light source, the imagery sample cell, the imagery lens and the imagery CCD are arranged in a straight line. Laser process and imagery simultaneous measure is provided for the first time, and particle size distribution data and shape parameters can be obtained through the imagery measurement combined in the laser particle size analyzer of a very widely distributed sample, so the imagery measurement combined laser particle size analyzer is very comprehensive, and has very good real-time property.