The invention discloses a round rebar feeding device. The round rebar feeding device comprises a rack, and two corresponding movable frames capable of moving to adjust the distance between themselvesare arranged on the rack. A vibration part and a quantitative conveying part are arranged on the inner side face of each movable frame in sequence. A first rotary shaft is arranged on the rack, and connected with a first motor arranged on the rack. A ratchet wheel is arranged on the first rotary shaft, and the semicircular outer edge on the ratchet wheel is sleeved with a limiting plate. A conveying channel for clamping and conveying round rebars is formed between the inner side face of the limiting plate and the ratchet wheel. The conveying channel is higher than a first transmission chain, so that when the round rebars are transported in the conveying channel, the first transmission chain and the two ends of each round rebar do not form position interference, the position of the ratchetwheel corresponds to the position of a second transmission chain, and convex sharp protrusions are arranged on the outer surface of the second transmission chain. Storage cavities for conveying the round rebars is formed between the adjacent shape protrusions, the two ends of each round rebar are placed in the storage cavities correspondingly, and a limiting block is arranged at the end, away fromthe ratchet wheel, of the second transmission chain.