A biplanar X-ray imaging device includes a second C-shaped arm and a first C-shaped arm which can be slidably disposed on the second C-shaped arm； a first X-ray generation device and a first image receiving device are disposed on the first C-shaped arm, thus constituting the first imaging device； a second X-ray generation device and a second image receiving device are disposed on the second C-shaped arm, thus constituting the second imaging device； the first C-shaped arm and the second C-shaped arm share the same rotating axis. For the biplanar X-ray imaging device, when the first C-shaped arm slides along the second C-shaped arm, different angles are formed between the first imaging device and the second imaging device； the first C-shaped arm and the second C-shaped arm share the same rotating axis, which ensures that the first imaging device and the second imaging device share the same rotating axis.
