A method for automatic connection of model components of a model of a technical system on a computer with a display, wherein the model has a first model component and a second model component. The first model component and the second model component each have at least one hierarchy element, wherein a hierarchy element contains no hierarchy element, or one hierarchy element, or multiple hierarchy elements. A hierarchy element has no port, or one port, or multiple ports, wherein a hierarchy element and a port have an identifier. A connection between two ports represents an assignment in the technical system. A first set of hierarchy elements and/or ports and a second set of hierarchy elements and/or ports is selected through a graphical user action, wherein a possible assignment is tested for a first port of the first set and a second port of the second set. A possible assignment is present if, for the first port and the second port, and ascending from the first port and the second port in accordance with the hierarchy, the identifiers of the hierarchy elements that are at a higher level than the first port and the second port each correspond at equal hierarchy levels up to a predefinable number of hierarchy levels starting from the port, or are evaluated as corresponding in accordance with a predefined rule. If a possible assignment is present, the possible assignment is displayed and/or the first port of the first set is automatically connected to the second port of the second set.