The automatic reciprocating paper tray production line is composed of a pulping system, a forming system, a drying system and a stacking system. It is used to produce fruit trays, wine bottle trays, electrial lining packing trays and other products. Using waste carton paper, waste newspapers, book papers, scraps and other waste paper as raw materials, through hydraulic disintegration, filtration, water injection and other processes to prepare a certain concentration of slurry, through the molding system on the special metal mold through vacuum adsorption A wet blank is formed, then dried by a dryer and stacked.