Wine cabinet with shelf spacing convenient to adjust

A wine cabinet with shelf spacing convenient to adjust comprises a shell, an inner container, a box body with a side opening, a foaming heat preservation layer, a connecting piece, three sections of drawer sliding rails and shelves, the two side walls of the inner container are each provided with at least two rows of longitudinally-arranged hole sets, and the connecting piece comprises a longitudinal base plate, a bottom horizontal plate, a bottom pin plate, a top horizontal plate and a buckle plate, the bottom horizontal plate and the bottom pin plate are arranged at the lower end of the connecting piece, and the top horizontal plate and the buckle plate are arranged at the upper end of the connecting piece; the box body is buckled with the outer surface of the inner container side wall plate and covers the longitudinally-arranged hole sets, the foaming heat preservation layer wraps the box body, the shelf is fixed to a sliding rail of the three-section drawer sliding rail, the longitudinal base plate is fix