The construction process of workshop digital twin models is complex, with diverse functional modules and data types. Currently, there is a lack of systematic and structured modeling and analysis methods guided by toplevel design. Traditional modeling methods with a single design structure are prone to content duplication or omission when constructing workshop digital twin models, making it difficult to achieve the systematic modeling requirements of workshop digital twin models. Based on the complexity of the workshop digital twin model and the diversity of IDEF method class expressions, a structured modeling and analysis method of the workshop digital twin model from four dimensions of functional modeling, information modeling, process modeling and ontology modeling is proposed. IDEF0 is used to describe the function of the digital twin model on the shop floor through functional decomposition and classification of the relationship between functions; IDEF1x is used to describe important information during the operation of the shop floor digital twin and define the interrelationships between data entities; IDEF3 is used to accurately describe the process changes and state transfers in the workshop with the data flow process during the operation of the workshop digital twin as the core; On the basis of information modeling and process modeling, IDEF5 is used to obtain concepts, terms and relationships in the field of workshop digital twins, and to collect facts and acquire knowledge through ontology modeling of the operation process of workshop digital twins. This method effectively avoids the problem that a single expression may only describe a certain feature in a complex system and ignore other important information, laying a foundation for improving the semantic consistency, reusability, structure, and automation of the workshop digital twin modeling process.