Transparent network message forwarding method under satellite-ground asymmetric transmission link

The invention discloses a network message transparent forwarding method under a satellite-ground asymmetric transmission link, which comprises the following steps: a ground network application sends a link layer network message through a virtual network device to realize forwarding of data from the ground network application to a ground station and complete data forwarding logic from the ground network application to the ground station; the ground station server establishes a data frame forwarding module between the ground station and the satellite platform based on the satellite-ground link; receiving data from a ground network application through a data frame forwarding module, and forwarding the data to a satellite platform through a satellite-ground link; meanwhile, satellite-ground data frames from the satellite platform are received, and data are forwarded to the ground network application; and the satellite platform realizes conversion between the satellite-ground data frame and the link layer network