Feeding device capable of improving accuracy for numerically controlled lathe

The invention discloses a feeding device capable of improving accuracy for a numerically controlled lathe. The feeding device comprises a machine body, a round pipe machined part, a cutting feeding structure, a guide pushing structure, a fixed plate, a movable plate, two pipe fitting limiting structures, two pipe fitting pressing positioning structures and a clamping detection structure. The guide pushing structure comprises a supporting plate, two guide columns and an electric push rod. Each pipe fitting limiting structure comprises a ring seat, an inserting column group and three permanent magnets; the inserting column set is composed of at least three inserting columns which are stacked in sequence and are different in diameter. According to the feeding device capable of improving the precision for the numerical control lathe, the requirement for rapid and accurate positioning of a round pipe machined part can be met, and the situation that due to the poor fixing effect of the round pipe machined part, the