A sewing machine having a precise corner angle. Two ends of a lower surface of a table (1) are respectively provided with support legs (2), and a cross bar (3) is provided between bottom ends of the support legs (2); the middle of the cross bar (3) is provided with a contact type foot pedal (4); the lower surface of the table (1) is further provided with a motor (6) by means of a bracket (5); the contact type foot pedal (4) is connected to the motor (6) by means of a wire; the sewing machine (7) is mounted on the surface of the table; a driven wheel (8) is arranged on one side of the sewing machine (7); the driven wheel (8) is connected to one side of the motor (6) by means of a belt (9); the lower surface of one end of the sewing machine (7) away from the driven wheel (8) is provided with a needle (10); the upper surface of the table (1) is movably provided with a turntable (11) located below the needle (10); the center of the turntable (11) is provided with a needle plate (12), and a locking screw rod (13) is transversely disposed in the table (1) and movably connected to the turntable (11). The machine has a reasonable structure, uses the turntable (11) and a scale thereon to be able to accurately control the corner angle, thereby greatly reducing the probability of defective products caused by a pattern angle problem and thus avoiding waste.
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