The invention discloses a Wilkinson power divider with isolation frequency point aligned Chebyshev filtering characteristics, which comprises an input end and two output ends, and also comprises two transmission branches connected in parallel between the input end and the two output ends; Each transmission branch is formed by connecting n sections of first transmission lines and one section of second transmission line in series; Wherein the second transmission line is selectively connected to the starting end or the tail end of the transmission shunt; The plurality of resistors are respectively connected between every two corresponding sections of transmission lines on the two transmission branches; The two groups of short-circuit wires are symmetrically connected to the two transmission branches; Each group of short-circuit lines comprises m short-circuit lines, and m is greater than or equal to 2 and less than or equal to n; When m is an even number, the short-circuit lines are connected to symmetrical positions on the two sides of the center of the n sections of first transmission lines; And when m is an odd number, the short circuit lines are connected to the central positionsof the n sections of first transmission lines and the symmetrical positions on the two sides of the central positions. The invention also provides a preparation method of the power divider.