The invention discloses a circular capacitor bar cutting device. Through the circular capacitor bar cutting device, the problems that an existing cutting device cannot meet the radians of capacitor bars of various specifications and scraps of capacitor bars are wasted seriously are solved. A left driving feed pressing wheel (4) and a left driven feed pressing wheel (5) are arranged on a vertical plate (2). A right driving feed pressing wheel (10) and a right driven feed pressing wheel (11) are arranged on a machine base (1). The left end of the vertical plate (2) is hinged to a support (3) through a hinge. A cutting positioning and pressing mechanism (12) for a circular capacitor bar (6) is arranged on the right side of the right driving feed pressing wheel (10). The front end of the circular capacitor bar (6) passes through a left gap formed between the left driving feed pressing wheel (4) and the left driven feed pressing wheel (5), an arc-shaped bracket (7) and a right gap formed between the right driving feed pressing wheel (10) and the right driven feed pressing wheel (11) and then abuts against the left side face of a pushing positioning block (13). The circular capacitor barcutting device guarantees the quality of capacitor cores and improves the production efficiency.