A physical keyboard and a network access method are provided. The physical keyboard is provided with a card slot, and after a wireless network card is inserted into the card slot, the physical keyboard is connected to a wireless network by the wireless network card so that the mobile terminal can achieve network access through the wireless network connected to the physical keyboard while the key-in data input of the mobile terminal is accomplished. The physical keyboard of the present disclosure not only has the key-in data input function but also can achieve the network access by means of the wireless network card. Moreover, the network connected to the wireless network card may be converted into the WLANs such as a Wi-Fi network by the physical keyboard 10 to provide access points for other terminals, and this improves the using experience and meanwhile saves the consumption cost of the user.