The microwave receiving front-end plays an important role in a channel receiver in the field of electronic surveillance. This paper presents a design scheme for an ultra-wideband, multi-channel, low-noise, low-sensitivity, and large dynamic range receiving front-end. Design simulation and prototype testing were used to verify the feasibility of the solution. Compared to traditional schemes, this receiving front-end optimizes the noise figure and switching isolation by 20%. The product size is 53 mm×115 mm×9 mm, and the performance indices meet the design requirements.