Bridge sliding device and a bridge construction system

A bridge construction system, comprising:

• a temporary support platform, the temporary support platform set up on one side of a bridge pier;
• and
• a bridge sliding device, wherein the bridge sliding device comprises:
• a slide rail assembly, the slide rail assembly comprising a rail configured to span across a temporary support platform and a bridge pier, the rail arranged along a transverse direction from the temporary support platform toward the bridge pier;
• a first sliding component slidably disposed on the rail, the first sliding component having a sliding start end and a sliding end opposite each other in the transverse direction;
• and
• a second sliding component unlockably locked to the sliding start end of the first sliding component, the second sliding component capable of sliding from the sliding start end to the sliding end of the first sliding component, the second sliding component configured to support a bridge deck truss, wherein the length of the second sliding component is less than the length of the first sliding component, and the length of the first sliding component is less than the length of the rail,
• wherein the slide rail assembly spanning the temporary support platform and the bridge pier, the first sliding component capable of sliding along the rail from the temporary support platform to the bridge pier, and the second sliding component capable of sliding from the sliding start end to the sliding end of the first sliding component.