The invention discloses a marine platform ramp with compensation function and using method thereof. The platform comprises a ramp body and an active compensation device. The ramp body is installed on the active compensation device. A rotating support device is arranged between the ramp body and the active compensation device. The rotating support device comprises a support platform, a pitch hydraulic cylinder and a rotating hydraulic motor. The marine platform ramp with compensation function conducts real-time compensation to the horizontal swing, longitudinal swing, ascending and descending through the active compensation device to enable the ramp body to keep stable in a vicious sea condition and enhance the safety and reliability of personnel in the landing and approaching. The rotating support device drives a ramp body installed on the support platform to rotate in 360 degrees through the rotating hydraulic motor. The retraction of the pitch hydraulic cylinder changes the inclination angle between the ramp body relative and the vertical plane.