The utility model provides a silk-screen printing device which comprises a rotary disc, and a positioning station and a printing station are sequentially arranged in the circumferential direction of the rotary disc. The at least one printing table is arranged on the turntable, and when the turntable rotates, the printing table is driven to rotate to a positioning station and a printing station; the positioning system is located at the positioning station and comprises an infrared light source and an alignment camera, and when the printing table rotates to the alignment station, the infrared light source and the alignment camera are both located above the printing table; and the printing system is located at the printing station and is in communication connection with the positioning system. According to the silk-screen printing device, the infrared light source emits infrared light to the back surface of the silicon wafer, and the alignment camera captures reflected light of the infrared light on the back surface of the silicon wafer to form an image, so that the position of a positioning pattern can be accurately obtained, and back surface grid lines can be accurately printed; andthe width of the back grid line is reduced to 140 microns, so that the double-sided efficiency of the double-sided cell is improved.