Children dining table and chair and table top supporting structure

The utility model relates to the technical field of children tools, and discloses a children dining table and chair and table top supporting structure which comprises a chair seat and chair legs below the chair seat, a support is arranged above the chair seat, a backrest is arranged on the rear side of the support, the front end of the support is detachably connected with a table plate through a connecting assembly, and handrail parts and supporting stand columns bent downwards are symmetrically arranged on the front side of the support. The connecting assembly comprises a first connecting piece arranged on the handrail part and a supporting connecting rod mechanism arranged on the supporting stand column, the first connecting piece and the supporting connecting rod mechanism are provided with arc-shaped clamping openings matched with the support, a first fixing seat matched with the first connecting piece is arranged at the bottom of the inner side of the table plate, and a second fixing seat matched with th