Offshore platform embarkation facility and offshore platform

An offshore platform embarkation facility, comprising:

• a lift tower, wherein the lift tower is provided with a climbing device, and the lift tower is provided with a transmission structure;
• a jacking frame, wherein a first moon pool allowing the lift tower to pass through is provided in the jacking frame;
• a lifting unit, wherein the lifting unit is installed on the jacking frame, and the lifting unit is configured to cooperate with the transmission structure to raise and lower the lift tower;
• and
• a lift platform, wherein a second moon pool allowing the lift tower to pass through is provided in the lift platform, and the lift platform is connected with the lift tower via the climbing device, and the lift platform is located below the jacking frame,
• wherein at least one roller support device is respectively provided at each of two sides to which the lift tower swings relative to a vertical direction, wherein each of the at least one roller support device comprises:
• a base, a roller and a roller carrier, wherein the base is mounted on the jacking frame, the roller carrier is mounted on the base, and the roller is rotatably connected with one side of the roller carrier and abuts the lift tower, and when the lift tower is raised or lowered, the roller rotates in a vertical direction around an axis of itself.