Network sharing method and device

The embodiment of the invention discloses a network sharing method. The method comprises obtaining up data packets sent by the first port of a first network adaptor; forwarding the up data packets to a network through the second port of a second network adaptor; obtaining down data packets sent back to the second port of the second network adaptor by the network; sending the down data packet to the first port of the first network adaptor. Correspondingly, the embodiment of the invention also discloses a network sharing device. The network sharing method and device can achieve network access of network adaptors which are not accessed to the network in a computer through network adaptors accessed to the network, provide basis for application of computer network sharing and improve the user experience.