The present invention discloses a pure counterflow plate bundle for a plate-shell type heat exchanger, which enables cold and heat mediums to flow in a broken-line track, that is, flow in from the front side but flow out from a lateral side. The plate bundle comprises flat peripheral corrugated plate sheets, embedded blocks and a plate box, wherein the peripheral sides of each flat peripheral corrugated plate sheet are straight sides and located in the same plane, and each embedded block is located on the peripheral sides of the flat peripheral corrugated plate sheet. Medium inlet/outlet holes are opened on each embedded block; an embedded block is sandwiched between two flat peripheral corrugated plate sheets so as to form, along with the two flat peripheral corrugated plate sheets, a plate chamber serving as a channel for the flow of a medium. Another embedded block is welded on any external surface of the plate chamber so that the holed direction of the embedded block is opposite to that of the former embedded block to form another plate chamber serving as a channel for the flow of another medium; and the plurality of the plate chambers together form the plate bundle of the plate-shell type heat exchanger. The present invention enables the plate bundle of a large plate-shell type heat exchanger to run at a high temperature, improves the usability of the heat exchanger and guarantees the reliable running of a heat exchanging and waste heat recovering device.