Modelica co-simulation modeling method and system and medium

The invention discloses a Modelica co-simulation modeling method, a Modelica co-simulation modeling system and a medium, and relates to the technical field of industrial simulation modeling. The method comprises the following steps: a server receives a login request sent by a user through a user terminal; when the login request is analyzed and verified to be correct, the server displays the target model on an interface of a user terminal of a corresponding user; when the user carries out visual modeling operation on the target model through the user terminal, the server receives the information message and sends the information message to the user terminals of other users who open the same target model; and other users opening the same target model decrypt the message through the user terminal to obtain a message plaintext, process the target model according to the message plaintext to obtain a combined object, and update the target model. Real-time message information transmission and data synchronization ar