Control device of circuit board hole blower knife and its control method

This invention discloses a device for controlling a knife of hole-blowing machine of CB including a knife, an entry-board gluing roller set at the side of the entry-board up and down, an outgoing gluing roller set at the side of the outgoing board up and down and a linkage unit, which includes a pair of first up and down linkage blocks fixed at both ends of the entry board roller, a pair of second linkage blocks fixed at both ends of the outgoing board roller and a pair of third up and down linkage blocks at both ends of the knife matched to the first and second blocks to rise together with the first block and falls back together with the second block. This invention also provides a control method.