The automatic reciprocating tray production line is composed of the pulping system, forming system, drying system, stacking system, vacuum system, high pressure water system and air compressor system. It is used to produce egg trays, fruit trays, beverage tray,s wine trays, coffee care, medical care and other products. Using waste paper such as newspaper, carton paper, office paper, scrap and other waste materials as raw materials, it is prepared into a slurry with a certain concentration through hydraulic crushing, filtration, water injection and other processes, and is vacuumed on a special metal mold by a reciprocating molding machine. It is absorbed into a wet billet, then dried by a drying line, and then stacked.