The dynamic changes about vasoactive intestinal peptide (VIP), angiotension Ⅰ (AⅠ)and angiotension Ⅱ (A Ⅱ)concentrations in plasma, cerebral spinal fluid (CSF) and brain extracts were studied in the experimental high-velocity missile wound models, which were produced on both hind legs of dogs. The findings were as follows: (1) Plasma VIP, AⅠ and AⅡ concentrations started to increase from 30 rain after the wound and the elevation had been continuing at 4 h after the wound. Their highest points of post-trauma were 2,9, 11.5 and 4.9 times as much as that of pre-trauma. (2) CSF VIP elevated at 4 h after the wound, but AⅠ and AⅡ concentrations reduced tempo tarily at 1 h and 2 h after the wound respectively. (3) The changes of VIP, AⅡ concentrations in the brain extracts tented to be consistent with that of the CSF. The signifcance and machanism of these changes of VIP and AⅡ concentration remain to be clarified.