To investigate the effect of Kwi Ryong Tang a precious tonic of herbal drugs, the blood of rabbit was depleted from the heart for the purpose of experiment and the author administered the Kwi Ryong Tang to that rabbit. This effect of the tonic on the experimental groups was Compared with that of the control group and the author observed the following results; 1. In the experimental group treated with Kwi Ryong Tang before the depletion of the blood, the recovery of blood, the recovery of blood loss is some what accelerated that in the control group. 2. In the experimental group treated with Kwi Ryong Tang after the depletion of the blood, the recovery of blood loss is slightly accelerated that in experimental group which was treated with Kwi Ryong Tang before the depletion of the blood. 3. In the experimental group treated with Kwi Ryong Tang before and after the depletion of the blood, the recovery of the blood loss is markedly accelerated Comparing, that in the experimental group which was treated with Kwi Ryong Tang before or after the depletion of the blood loss.