A last-stage moving blade of a 3600 RPM wet-cooling steam turbine comprises a blade root, a blade body, a surrounding belt and a pull rib. The blade body is a special-shaped body formed by laminating a plurality of characteristic sections according to a specific rule. The contour of each characteristic section is formed by combining an inner arc curve and a back arc curve. Each characteristic section has the characteristic parameters of the installation angle c1, the chord length b1, the maximum thickness w1, the axial width Xa and the section area Ar. According to the laminating rule of the characteristic sections, all the sections are in continuous and smooth transition and change in a tower manner from the root end to the top end in the blade height direction. The root diameter of the blade body is Dr, and the effective height of the blade body is H. From the root end section to the top end section, the relative value of the effective height is monotonically increased to 1.0 from 0.0. Accordingly, from the root end section to the top end section, the installation angles c1 are monotonically decreased to 15.11 degrees from 74.23 degrees; the relative values of chord lengths b1 are monotonically decreased to 1.0 from 1.32; the relative values of the maximum thicknesses w1 are monotonically decreased to 1.0 from 3.58; the relative values of the axial widths Xa are monotonically decreased to 1.0 from 4.55; and the relative values of the section areas Ar are monotonically decreased to 1.0 from 4.51.