Last-stage moving blade of air-cooled steam turbine

The invention discloses a last-stage moving blade of an air-cooled steam turbine. The effective height H of the last-stage moving blade equals to 770.0mm, and the root diameter Dr of the last-stage moving blade equals to 1905mm; the relative value of a blade height is monotonically increased from 0.0 to 1.0; an installation angle c1 is decreased from 70.58 degrees to 13.67 degrees; the variation rule of an area A from a root section to a top section is that: A is more than or equal to 1.0 and is less than or equal to 4.68; the variation rule of an axial width Xa from the root section to the top section is that: Xa is more than or equal to 1.0 and is less than or equal to 4.628; the variation rule of an chord length b1 from the root section to the top section is that: b1 is more than or equal to 1.0 and is less than or equal to 1.612; and the variation rule of a maximum thickness W1 from the root section to the top section is that: W1 is more than or equal to 1.0 and is less than or equal to 2.214. The last-stage moving blade is applied to subcritical, supercritical and ultra supercritical air-cooled steam turbines with the power of 500 MW to 1,000 MW and a rotating speed of 3,000 rpm.