The invention discloses a multi-point supporting type integral bridge deck system and relates to the field of bridge support. The bridge deck system can be applied to a variable-height part of a through variable-height continuous steel truss beam. The bridge deck system comprises a bridge deck system, a supporting structure for supporting the bridge deck system as well as a connecting structure between the bridge deck system and the supporting structure; the bridge deck system comprises a plurality of cross beams; edge longitudinal beams are arranged on the two sides of the cross beams correspondingly; the cross beams and the edge longitudinal beams form a rectangular frame; the supporting structure is arranged on web member of the variable-height steel truss; and the two ends of the crossbeams are supported on the supporting structure. The multi-point supporting type integral bridge deck system can guarantee that load on the bridge deck system is transmitted to a main truss, does notneed to set a horizontal chord at the corresponding web member position of the bridge deck system and does not need to bolt and weld the bridge deck system and the main truss web member.