The invention provides a plate-chain skid conveyor line comprising a drive device, a supporting plate, a first supporting column, a second supporting column, a third supporting column and a fourth supporting column. The first supporting column and the second supporting column are oppositely arranged. The first supporting column and the third supporting column are both connected with a first rotating shaft in a rotating manner. A first transmission gear and a second transmission gear are oppositely arranged on the first rotating shaft. The second supporting column and the fourth supporting column are both connected with a second rotating shaft in a rotating manner. A third transmission gear and a fourth transmission gear are arranged on the second rotating shaft. The first transmission gear is connected with the third transmission gear through a first transmission chain. The second transmission gear is connected with the fourth transmission gear through a second transmission chain. The supporting plate comprises a limiting face. A connection shaft is arranged between the first transmission chain and the second transmission chain. Positioning supporting grooves are formed in supporting wheels of the connection shaft. Containing holes are formed in the supporting plate. The drive device is connected with the first rotating shaft. A supporting frame is arranged between the first supporting column and the second supporting column. The plate-chain skid conveyor line is high in stability and low in energy consumption.