The invention provides a sectional matching and filtering method for a coherent frequency diversity array radar. The method mainly solves the problem in the prior art that the existing radar system cannot realize the distance-angle two-dimensional matching and filtering function in the wide-area coverage condition. The method comprises the steps of 1, obtaining the receiving-end echo signal of a coherent frequency diversity array; and constructing the expression of a corresponding transmit beam pattern; 2, according to the corresponding transmit beam pattern, acquiring an illumination time period configured to point to the main lobe of a beam at a specific spatial angle, and designing a time width matched with a sub-pulse; 3, according to the time width matched with the sub-pulse of a function, uniformly dividing the time of transmitted pulses, and constructing an angle-time two-dimensional and sectional matching and filtering function corresponding to each matched sub-pulse. According to the technical scheme of the invention, the total-space coverage capability of the coherent frequency diversity array is fully utilized, so that the method can be used for designing the transmit beam patterns of low-range side lobes and low minor lobes.