Congestion prediction method and device for chip routing, and medium

The invention relates to a congestion prediction method and device for chip routing and a medium, and the method comprises the steps: obtaining a netlist and a design specification of a target chip, the netlist representing a circuit structure of the target chip determined through logic and function design based on the design specification, and the design specification representing the technical requirements of chip design; feature extraction is conducted on the netlist and the design specifications, circuit structure information and design specification information are obtained, a circuit heterogeneous graph is constructed based on the circuit structure information and the design specification information, the circuit structure information comprises node information and graph structure information of the target chip, and the design specification information comprises design parameter information; the circuit heterogeneous graph is input into the congestion prediction model for calculation, a prediction resul