A method, an apparatus and a network device for user data transmission are provided, where the method includes: transmitting a multicast frame for acquiring a user scheduling request to users in a user group, the multicast frame includes a long training sequence and a spread spectrum sequence(s) allocated to all users in the user group; receiving the user scheduling request(s) fed back by a user(s) with data transmission in the user group, the user scheduling request(s) is fed back by the user(s) using at least one of the long training sequence(s) and the spread spectrum sequence(s) allocated to the user(s); scheduling user data transmission according to the user scheduling request(s). According to embodiments of the present disclosure, the delay of users with data transmission is reduced, and the quality of service for the system is improved.