The certification scheme of coaxiality measurement of box hole relies too much on manual experience,resulting in inconsistent certification process and poor comparability of measurement results.In order to solve the problem,an automatic generation method of coaxiality measurement certification scheme of box hole was proposed based on ontology.The semantic model of measurement certification engineering was constructed,and it was transformed into a computer readable and interpretable meta-ontology model.Then,the rule base of measurement certification scheme generation was established,and the standard paradigm of measurement certification,operational parameters and measurement parameters were generated by reasoning according to geometric element types,tolerance items and tolerance principles.Finally,through the size information on the reducer and the coaxiality geometric specification,the automatic generation process of the coaxiality measurement certification scheme of the box hole was shown,and its effectiveness was verified.The results show that the proposed method can realize the automatic generation of measurement authentication scheme in a simple and efficient way without relying on manual decision-making.