Abstract: This paper summarizes the new characteristics of the VSC-HVDC using the grid-forming control and proposes the corresponding method for the electromechanical transient modeling. Through analysis, it is proposed that the main changes of the VSC-HVDC brought by the replacement of the grid-following control by the grid-forming control are: the voltage source support, the AC fault ride-through switching measures and the current limiting method. Correspondingly, the grid-forming control VSC-HVDC electromechanical transient model is an improvement of the grid-followed VSC-HVDC model, including changing the interface between the converter and the AC network from the average power within the traditional AC simulation step to the average voltage, adding the fault ride-through switching logics and the current limiting measures based on the user definition. The effectiveness of the proposed model is verified by the simulation comparison of the AC and DC grid interface building methods and the fault simulation of the electromechanical and electromagnetic transient models. The model is able to accurately simulate the dynamic behavior of the grid-forming control VSC-HVDC in the AC power grid and has a good application value.