The invention relates to a word plate bonding device, a bonding method and application thereof in automotive parts, a word plate (1) is bonded to a workpiece (35) by use of an adhesive tape (16), the adhesive tape (16) is double-sided sealed by use of films, and the device includes a sliding plate (5), a moving plate (13), a rotating plate (14), a workpiece placing block (7) and a pressing block (22) which are respectively driven by cylinders, a word plate placing block (8) with a word plate concave pit (9) on the surface is arranged on the sliding plate (5), an adhesive tape placing block (15) with an adhesive tape concave pit (17) on the surface is arranged on the rotating plate (14); when bonding, the word plate (1) and the adhesive tape (16) are firstly respectively placed in the word plate concave pit (9) and the adhesive tape concave pit (17), by sliding of the sliding plate (5), overturning of the rotating plate (14) and movement of the moving plate (13), the adhesive tape (16) is bonded to the word plate (1), the workpiece (35) is placed on the workpiece placing block (7) above the word plate placing block (8), then positioned and put down to bond with the adhesive tape (16) bonded to the word plate (1), and the pressing block (22) is sued to press and reinforce the bonding; the word plate bonding device is good in bonding effect, high in efficiency, and especially suitable for automotive tail door handle parts.