Objective To improve the method of retinal vascular preparation and application in experimental animals of mice, rats, dogs and monkeys. Methods The retinal vessels were isolated with proteinase K-trypsin digestion technique. The samples were stained by hematoxylin-eosin(HE) and Periodic-Acid Schiff(PAS). The expression of CD31 and VEGF were detected by immunohistochemistry(IHC). Results The spread sheets of vascular network are complete, and can clearly show the blood vessels. No nerve tissue residue is left. Different levels of vascular morphology are clear. The vascular branches are clear and complete with no fracture. The cell morphology is intact, and the cell nucleus is clearly dispayed. The entire process can be completed in a short time, and has a high success rate. The vascular antigen are successfully retained: Expression of CD31 can be seen in both pericytes and endothelial cells; VEGF is mainly expressed in endothelial cells. Conclusions The improved method is successfully applied in different experimental animals. This approach will provide an important contribution to the retinal vascular disease research.