Abstract: A minimum variance distortionless response adaptive beamformer based on weighted covariance matrix reconstruction (WCMR-MVDR) is proposed. This algorithm controls mainlobe distortion and sidelobe levels by selecting an appropriate integration interval during the reconstruction of the interference-plus-noise covariance matrix. Moreover, efficient and flexible sidelobe shaping is achieved by optimizing the design of the sidelobe weighting function in the reconstruction process. WCMR-MVDR has low computational complexity and high stability, which can effectively achieve adaptive sidelobe interference suppression under precise and robust control of the mainlobe and sidelobe characteristics of the antenna pattern.