Universal positioning tool

The invention discloses a universal positioning tool which is used for positioning a part to be installed on a product. The universal positioning tool comprises a bottom plate, a positioning block and a part mounting assembly. The positioning block is slidably connected to the bottom plate; a positioning structure capable of abutting against the edge of a product is formed between the positioning block and the bottom plate. The part mounting assembly is detachably connected to the bottom plate; and a limiting structure for limiting the part is arranged on the part mounting assembly. After the bottom plate is stably clamped at the edge of glass through the positioning block, the light sensing assembly transmits an adjusting signal after collecting and comparing position information to the displacement adjusting assembly, so that the displacement adjusting assembly converts the signal into adjusting prompt information, and the positioning tool is conveniently adjusted to a correct position; therefore, the part