Heat exchange plate, heat exchange plate pair and heat exchanger

The utility model provides a heat exchange plate, a heat exchange plate pair and a heat exchanger, and the heat exchange plate comprises a plate body which comprises a heat exchange area; a plurality of staggered baffling parts are arranged on the plate body at intervals in the length direction of the plate body, so that the heat exchange area is divided into a plurality of sub heat exchange areas; in the width direction of the plate body, one end of the baffling part is connected with one long edge of the plate body, and the other end of the baffling part and the other long edge of the plate body are arranged at intervals, so that the adjacent sub heat exchange areas are communicated; a first flow channel connecting port and a second flow channel connecting port are formed in the long side of the plate body, the first flow channel connecting port and the second flow channel connecting port communicate with the corresponding sub-heat-exchange areas correspondingly, and the widths of the multiple sub-heat-exch