Objective: Explore the microscopic identification of Oxalis corniculata specificity for the further research and to provide evidence for identification. Method: With safflower O. corymboas as control

using conventional microscopy techniques to observe the organizational structure and microscopic characteristics of the O. corniculata from different origins and different elevations. Result: The fresh O. corniculata cross-sections microscopic characteristics from different origins and different elevations are similar

but O. corymboas cross-sections microscopic characteristics with fresh safflower is obvious different; microscopic characteristics of O. corniculata powder from different origins and different elevations had no obvious difference

and with safflower O. corymboas differences are also not obvious. Conclusion: The microscopic features of cross-section of fresh O. corniculata have strong specificity

which can be used as microscopic identification basis for fresh O. corniculata

but microscopic characteristics of O. corniculata powder as a basis for identification will be questionable.