Disclosed is a double-channel based civil aviation air-ground communication continuous interference suppression method and system. The double-channel based civil aviation air-ground communication continuous interference suppression method comprises converting two-channel very-high-frequency signals received by a double-antenna array into intermediate-frequency digital signals; performing filtering extraction on the two-channel digital signals after the analog-to-digital conversion; performing orthogonal transformation on the signals after the filtering extraction and changing real signals into complex signals; sending the complex signals after the transformation into a monitoring module for judgment, determining whether only interference is produced in the signals or not and sending the complex signals into a weighted vector calculation module for self-adaptive weighted vector calculation if yes, wherein only the interference is produced in the sent complex signals; performing beam forming on the transformed complex signals through weighted vectors obtained through the self-adaptive weighted vector calculation if not; performing demodulation on the signals after interference suppression, filtering high-frequency noise waves through a low-pass filter and performing D/A (Digital-to-Analog) conversion to output clear audio signals. The double-channel based civil aviation air-ground communication continuous interference suppression method and system is free of constant modulus feature requirement for the interference and accordingly the constant modulus array error capture is avoided and the complex operation problem caused by the constant modulus array error capture is avoided.