The utility model discloses an automatic transferring device of a supersonic line bonding machine. The automatic transferring device comprises a motor, a lead screw, a guide rail, a base platform, a workbench, sliders, a control device and a line bonding head, the workbench is arranged on the sliders which are slidably connected with the guide rail, the line bonding head is arranged above the workbench, the motor is connected with the guide rail through the lead screw, the guide rail is mounted on the base platform, and the control device is connected with the motor. By the automatic transferring device, semiautomatic production is realized, line supplementing rate is lowered from original 7% to be below 2.5% abnormally and lowered from original 2.32% to be below 1%, single-product line bonding time is reduced from 9.11s to 7.2s, using of gummed paper is omitted, 1.1m of single-side gummed paper and 1.1m of double-side gummed paper can be saved each plate averagely, old-style carrier plates and a process in which the carrier plates need to be corrected and replaced frequently are omitted, stability is realized really, and quality is guaranteed.