In order to solve the reliability problem of PD driver circuit, a high precision PD driver circuit with hysteresis structure based on the traditional circuit was designed and implemented. A symmetrical double-path structure were adopted to adjust the rising and falling edge time of the signal respectively, and the hysteretic conduction method was used in each path to improve the control precision. The current limiting mode was adopted to solve the oscillation phenomenon caused by parasitic effect and improve the reliability of communication. This driver circuit was fabricated in TSMC 018 μm CMOS process. The tested results showed that, when the external frequency of BMC square wave was 300 kHz, the rising and falling edge time of voltage signal on the cable were 340 ns, no obvious oscillation. The static power consumption of this circuit was less than 400 μA, and it had good practical value.