The disclosed grating-type processing method for transparent page comprises: in the first scanning, taking grammatical interpretation to the page description file, dividing page areas, and writing primitive object information and transparent parameters into the intermediate file; in the second scanning, reading objects and parameters in turns from the intermediate file, and assembling the page dot matrix. Correspondingly, it also discloses the processing device, included a grammatical interpretation unit, a partitioning unit, a file memory unit and an assembly unit. This invention can reduce memory spending for higher assembly efficiency.