Objective To describe the morphometric and hemodynamic characteristics of main cutaneous arteries of rats. Methods The anatomy of cutaneous arteries was studied using a modified lead oxidegelatin injection technique in 12 rats. Angiograms were assembled with Adobe Photoshop and analyzed with Scion Image Beta to determine the scope of blood supply, the trend in blood vessel density and blood supply. Results The main source vessels contributed a summed mean of 6 cutaneous arteries in the rat trunk, with a mean emerging vessel diameter of (0.53±0.12)mm，the perimeter of the skin that could potentially be supplied by the cutaneous artery averaged (18.74±4.84)cm, and its mean vascular density was (391.31±76.58) gray value/(pixelI>&#/I>8226;mm）. It was positive correlation between the diameter and its supplying perimeter, the linear regression was y=32.441x+1.233( EM> r/EM> =0.851，EM> n/EM> =54,EM>P/EM><0.01). Conclusion The diameter and the perimeter of its nutrient region is directly proportional. In the case of the same perimeter, nutritional distribution is more close to the regional round, the greater the area of nutrition. The