The invention discloses a printing control method used for increasing printing speed of an entire inkjet system. The method includes: generating grating lattices of a to-be-printed page on the basis of to-be-printed content; determining positions, of M blank lines and each blank line as well as N content lines and each content line, in the grating lattices, wherein M is an integer larger than or equal to 0, and N is an integer larger than or equal to 1; when printing reaches positions corresponding to each line in the M blank lines, closing a printing head and controlling running speed of a medium platform loaded with printing media to be a first speed value; and when printing reaches positions of each line in the N content lines, opening the printing head and controlling the operating speed of the medium platform loaded with the printing media to be a second speed value, wherein the first speed value is not smaller than the second speed value. The invention further discloses a device used for realizing the method.