The utility model belongs to the technical field of the inspection machine, a portable plate heat exchanger slab count pen is disclosed, including a body, metal pen point, reset key, set up the counter in the body, these counter both ends link to each other with metal pen point, reset key respectively, the key top that resets end sets up flexible wire, should link to each other with conductive clip by the flexible wire other end. The utility model provides a plate heat exchanger slab manual count inaccurate, the difficult problem of count to count work efficiency has been improved.