Based on the noise mechanism and character of the L1T2 high lift device, two types of continuous mold-line links(CML) was designed to reduction the flap side edge noise. The noise reduction technology based on continuous mold-line links was verified in the aeroacoustic wind tunnel. The noise data of the continuous mold-line links model under different flap angle and attack angle was tested by microphone phased array and far-field microphones, and analyzed by means of beamforming, sound pressure level integration and spectrum analysis. The test results showed that the noise generated by the flap side edge dominated in the frequency range of 5kHz to 16kHz, was the major sour of flap noise under the 30° flap angle. The continuous mold-line links could reduce the flap side edge noise obviously in this frequency range under the 30° flap angle, the most noise reduction could reach 9dB. Comparing the performance of noise reduction of continuous mold-line links under different flap angle and attack angle, the noise reduction level of continuous mold-line links was found to be related to the flap angle and attack angle. For the current research, the noise reduction level increase with the flap angle, and decrease with the attack angle.