The invention discloses a complementary correction method for multiple atmospheric pressure sensors. The method comprises the steps of installing two atmospheric pressure sensors on a device having acomplementary atmospheric pressure zone to obtain a complementary atmospheric pressure sensor; and then averaging the atmospheric pressure values obtained by the two atmospheric pressure sensors to obtain a corrected atmospheric pressure value. The method can well obtain the approximate static atmospheric pressure by averaging the readings of the two sensors so as to obtain a complementary accurate atmospheric pressure value, and solves the problem that the reading of a single atmospheric pressure sensor cannot accurately reflect the atmospheric pressure value because of local airflow disturbance. The method is especially suitable for the atmospheric-pressure altitude holding of a UAV such as a quad-rotor UAV. The correction method of the present invention can well solve the problem that the local airflow around the quad-rotor UAV is greatly affected by a propeller.