A new technology for obtaining a high yield atorvastatin intermediate is provided. According to the invention, chloropropylene oxide and hydrocyanic acid are used to synthesize 4-chloro-3-hydroxybutyronityile (ATS-3 for short) which is used to synthesize ethyl-4-chloro -3-hydroxybutyate (ATS-4 for short), and the ATS-4 is reacted with solid sodium cyanide to synthesize the final product ethyl-4-cyan -3-hydroxybutyate (ATS-5 for short). The synthetic technology which has the advantages of no generation of cyanogen-containing wastewater, high yield, and full resource utilization is an ideal synthetic technology.