In response to the demand for low-cost 3D heterogeneous integrated RF front-end and phase-controlled arrays, an integration Ka-band phased array RF front-end module based on 3D-integrated packaging is proposed in this paper. It can realize the miniaturization of the RF front-end system, greatly reduce the volume and weight of the radar system, and effectively control the total cost. The proposed module consists of final power amplification, drive amplification, low noise reception, phase shift, and attenuation control. The electronic scan range of this module is greater than 15° within the 32-38 GHz frequency passband.