The invention discloses a conveying and guiding device for machining. The conveying and guiding device comprises a first rack, a base and a second rack, all of which are sequentially arranged from left to right. A first supporting leg and a second supporting leg are mounted at the bottom of the first rack and the bottom of the second rack correspondingly. A first conveying device and a second conveying device are mounted on the first rack. A rotating device comprises a third motor, an output shaft, a main shaft and belt wheels. A protection clamp ring is arranged on the outer side of a rotating disc and is fixedly connected to the first rack and the second rack through supports. An arc frame is arranged at the position, located on one side of the top of the rotating disc, of the inner sideof the protection clamp ring. The protection clamp ring and the arc frame are connected through a guide rod. The arc frame is in sliding connection to the guide rod through a sliding block. Conveyedcomponents continue to be cyclically guided on the rotating disc, the situation of material blocking is avoided, labor force is relieved, adjustment is convenient, and adaptability is higher.