The invention discloses a chamfering machine for the end tip of round steel. The chamfering machine comprises a stander; a power device and a mould set are arranged on the stander; the mould set comprises a flower tooth circular arc mould and a flower tooth tapered mould which are concentrically arranged; one end of the flower tooth tapered mould with small-diameter end face faces toward the outside of the stander; a round steel machining passage is formed between the flower tooth tapered mould and the flower tooth circular arc mould; and the power device is in transmission connection with the flower tooth tapered mould by a transmission device. The chamfering machine has a simple structure and convenient use and can carry out end correction and chamfering to a cut round steel workpiece in a construction field.