Single-slit knuckle bearing assembly tool

The utility model discloses a single-slit type knuckle bearing assembly tool which comprises a base plate and two rotary breaking modules, the two rotary breaking modules are rotationally connected to the base plate and arranged on the base plate in a left-right opposite mode, and a containing position used for containing a bearing outer ring with a single slit is formed between the two rotary breaking modules. Clamping blocks for clamping the outer ring of the bearing are arranged on the two rotary breaking modules, a first driving part is further arranged on the base plate, and the first driving part is used for driving the rotary breaking modules to move so as to break and expand the outer ring of the bearing in the side direction along the single seam. The rotary breaking module is driven by the first driving component to move so that the bearing outer ring can be broken and expanded towards the side direction along the single slit, then the adaptive bearing inner ring can be rapidly and conveniently inst