A test-bed balance adjustment method for the HP-IP (High pressure-Intermediate Pressure) rotor of a 600 MW steam turbine relates to a method for the test-bed balance adjustment of a rotor and aims to solve the problems of low balance efficiency and low balance accuracy of the existing balance method for the HP-IP rotor of the 600 MW steam turbine. In a low speed balance process, the residual balance amount of each plane of the rotor is controlled within 200 g; in a high speed balance process, when the vibration velocity of the first-order critical rotating speed of the rotor is greater than 2.5 mm/s; a balance weight is arranged on the middle plane of the rotor for weight increase adjustment; when the vibration velocity of the first-order critical rotating speed of the rotor is lower than 2.5 mm/s, no weight is increased on the middle.