A wireless communication device and a method for adjusting a maximum number of accesses thereby are provided. The wireless communication device comprises a network speed providing module and a Wireless Local Area Network (WLAN) access number control module, wherein the network speed providing module is configured to provide a speed at a network side to a WLAN side; and the WLAN access number control module is configured to adjust a maximum number of accesses of a WLAN according to the speed at the network side provided by the network speed providing module. Through the disclosure, communication quality is ensured for an Internet user by adjusting a maximum number of user accesses of Wireless Fidelity (Wi-Fi); and when the network gets worse, the access of an excess user is not allowed or some users are removed according to a user rule.