The invention discloses a full automatic plane labeling machine which comprises a rack. A main supporting plate is fixed on the rear portion of a top plate of the rack; a total groove is formed in the top face of the top plate of the rack; conveying driving rollers are hinged to the left end and the right end of the total groove; a conveyer belt is connected on the two conveying driving rollers in a tensioning mode; a conveying motor is fixed on the front wall face of the right end of the top plate of the rack; and an output shaft of the conveying motor stretches into the total groove and is connected with connecting shaft portions of one ends of the conveying driving rollers through a coupling. A first connecting block is fixed on the front wall face of the left end of the main supporting plate; a first proximity switch is fixed on the first connecting block; and the induction end of the first proximity switch is arranged vertically downward and faces the top face of the conveyer belt. According to the full automatic plane labeling machine, the products to be stuck can be automatically conveyed, automatic counting and positioning are completed to realize automatic label sticking, the tension degree of paper tape conveying can be adjusted, meanwhile, a paper tape of a label rolling cylinder can be guaranteed to be separated from a label, and the label sticking effect is improved.