The utility model discloses a peak expiratory flow rate measuring device with storing and reading functions. The peak expiratory flow rate measuring device comprises a peak flow rate measuring device, a memory and a blow pipe, wherein the peak flow rate measuring device comprises a casing, a connecting strip, a choke-flow sheet and a spring; the connecting strip is fixedly arranged in an inner cavity of the casing; the choke-flow sheet is sheathed on the connecting strip and can slide on the connecting strip; the spring is used for resetting the choke-flow sheet; the memory comprises a base, a recording chip, a circuit board, a range finder, a USB (Universal Serial Bus) interface and a switch; the base is arranged at the tail end of the casing; the recording chip, the circuit board, the range finder, the USB interface and the switch are arranged in the base; the range finder is used for measuring the displacement distance of the choke-flow sheet; the blow pipe is detachably and fixedly arranged at the top end of the peak flow rate measuring device; and a piece of filtering paper is arranged between the blow pipe and the peak flow rate measuring device. A pipe mouth of the blow pipe is elliptical, so that tester at each age group can find pipe blowing sections in accordance with mouth shapes per se, no air leakage during the monitoring period is ensured and the peak expiratory flow rate measuring device is suitable for the testers at each age group. Meanwhile, the monitoring result each time can be continuously stored and can be read on a computer through related software.