As a reference laboratory,the institute participated in the organization and implementation of Zhejiang Market Supervision Administration,and the leading laboratory was the angle block measurement comparison of Zhejiang Institute of Metrology.This paper mainly introduces the comparison method of this measurement comparison,and analyzes the results of the comparison.It points out the problems and deficiencies in the angle block verification,analyzes the causes,puts forward feasible suggestions and improvement measures to promote the development of metrological verification in the angle block field in this province.