Embodiments of the present invention disclose a wireless Internet device. The wireless Internet device includes a device body (1) with an accommodation space, a connection interface (2) set in the accommodation space, and a subscriber identity module (SIM) card holder (3) configured to install a SIM card, where a push-locking apparatus (4, 5) is also set in the accommodation space; the push-locking apparatus (4, 5) includes a push part (41, 51) and a locking part (42, 52); the push part (41, 51) is connected to the locking part (42, 52). The solution provided in the embodiments of the present invention can achieve a purpose that the SIM card holder (3) cannot be randomly plugged in and out when the wireless Internet device works.