The study was undertaken to investigate the blood stasis of chronic pelvic inflammatory disease (PID) with scientific method, hemorheology. The whole blood viscosities of chronic PID increased significantly compared with normal level, which was consistent with the blood stasis of Traditional Chinese Medicine (TCM) theory. Moreover, sixty women suffering from chronic PID were treated with Enema Retention of Li Chong Tang Combined with Moxibustion (ERM) for 6 weeks. The chronic PID score and the whole blood viscosity were evaluated before and after the ERM. The parameters of whole blood viscosities at low, median and high shear rate of chronic PID group decreased from 12.32±0.31, 6.66±0.13 and 5.15±0.52, to the normal levels, 9.19±0.13, 5.42±0.56 and 4.34±0.43 (p<0.05) after therapy of ERM and the symptoms score decreased from 13.73±3.7 to 3.8±1.4 (p<0.05), which shows that the ERM is an effective therapy method to treat chronic PID.