Abstract: The present invention relates to a user screening method and a base station for user screening. The method includes: judging whether the number of users detected within a current TTI exceeds an upper limit of the number of users capable of being processed within the current TTI; and if the upper limit is exceeded, discarding users corresponding to preamble sequences generated by a same root sequence. Whether a current load condition is a high load is known by judging whether the number of users detected within the current TTI exceeds the upper limit of the number of users capable of being processed within the current TTI, and the users detected under a high load condition are detected and discarded, so that a random access false alarm flow caused by interference signals is effectively controlled.