The present invention pertains to the field of 
human medicine, which relates to a 
drug for the treatment of type I and 
type II diabetes and provides a preparation method and the usage of a 
human insulin analogue. The 
human insulin analogue of the present invention is characterized in that the 
human insulin analogue has the form as the right formula, wherein, R1 is any one 
amino acid residue of Pro, Ala, Gly, Ser, Val and Leu; R2 is any needed 
amino acid residue which can be encoded genetically; R3 is n paragraphs of R2-R1-
dipeptide fragment, n is any one number of 0, 1, 2, 3 and 4. The human 
insulin analogue of the present invention is prepared by using a 
biological engineering method, the active 
insulin analogue has the advantages that the human 
insulin analogue is not easy to from the 
dimer and mainly exists by a 
monomer form after the 
subcutaneous injection, the local absorption is faster, the onset time is shorter, and the 
pharmacokinetics characteristics are more in line with the change spectra of physiological insulin and blood glucose.