A plate chain conveyer is used to solve the conveying problem of work pieces and products on a product line, and the plate chain conveyer comprises a conveying mechanism, a driving mechanism, a tensioning mechanism, a conveying rail and a mounting fixing mechanism. The conveying mechanism comprises a plate chain, road wheels, return wheels and pin rolls. The plate chain is composed of a chain, panels and a link plate. The pitch number of the chain matches with the number of the panels, the chain is arranged on a central position below the panels, the panels are fixed above the chain through the link plate, a set of road wheels and return wheels is respectively arranged on a left side and a right side of a bottom face of each panel, and the road wheels and the return wheels are connected together through the pin rolls. The plate chain conveyer enables the conveying of the work pieces and the products to be stable, safe and reliable, and manufacture and maintenance costs of a device can be reduced.