A C-arm X-ray apparatus having a surgical positioning and linear navigation function, comprising a C-arm (4), an image enhancer (1), an X-ray tube (3), a support frame (8), a trolley (5), a monitor (7) and a central controller (6). The image enhancer (1) is disposed at one end of the C-arm (4), and the X-ray tube (3) is disposed at another end of the C-arm (4). The C-arm (4) is mounted on the support frame (8) and can rotatably slide along the support frame (8). The support frame (8) is mounted on the trolley (5), and can horizontally slide along the trolley (5). The monitor (7) and the central controller (6) are electrically connected to the image enhancer (1) and the X-ray tube (3). A positioning module (2) is also provided on the C-arm (4), and the positioning module (2) cooperates with the image enhancer (1) and the X-ray tube (3). The C-arm X-ray apparatus having a surgical positioning and linear navigation function enables a doctor to rapidly and accurately perform a surgical operation, such as a minimally-invasive interventional treatment, has high precision and stability, improves surgical safety, shortens operation time, and reduces radiation exposure resulting from taking multiple X-ray images, thus reducing risks of tissue damages and complications.La présente invention concerne un appareil à rayons X avec bras en arc de cercle ayant une fonction de positionnement chirurgical et de navigation linéaire, qui comprend un bras en arc de cercle (4), un amplificateur dimage (1), un tube à rayons X (3), un bâti de support (8), un chariot (5), un moniteur (7) et une unité de commande centrale (6). Lamplificateur dimage (1) est disposé au niveau dune extrémité (1) du bras en arc de cercle (4), le tube à rayons X (3) étant disposé à lautre extrémité du bras en arc de cercle (4). Le bras en arc de cercle (4) est monté sur le bâti de support (8) et peut coulisser de manière rotative le long de celui-ci. Le bâti de support (8) est monté sur le chariot (5) et peut coul
