The utility model relates to an aviation three-level electric-excitation-type synchronous-motor starting control apparatus. The electric-excitation-type synchronous-motor starting control apparatus is characterized in that a position sensor is connected with a three-level electric-excitation-type synchronous motor and measures rotor position theta and rotating speed omega of a main generator at present; a current collection circuit measures three-phase current iA, iB and iC of the main generator from an AC inverter circuit, an input terminal of a rectification circuit is connected with a three-phase AC power supply and an output terminal of the rectification circuit is connected with a filter circuit, and output of the filter circuit is connected with a three-phase full bridge inverter and a single-phase H-bridge inverter; and an output terminal of the single-phase H-bridge inverter is connected with a stator single-phase winding of an exciter. The three-level electric-excitation-type synchronous motor is controlled in order to realize rotor excitation of the main generator. An output terminal of the three-phase full bridge inverter is connected with a stator three-phase winding of the main generator of the three-level electric-excitation-type synchronous motor. After the rotor of the main generator realizes excitation, the main generator is controlled to realize electric operation of the three-level electric-excitation-type synchronous motor. The synchronous-motor starting control apparatus provided by the utility model has relatively few control links, a speed-ring PI regulator and a current-ring PI regulator are mutually independent and parameter adjustment is convenient.