Method, apparatus and system for training transmission beam

Provided are a method, apparatus and system for training a transmission beam, relating to the technical field of communications, and being able to improve the accuracy of training an uplink transmission beam, thus improving the transmission quality of uplink data. The method is applied to a network device. The method comprises: receiving a preamble sequence sent by a first user equipment (UE) using at least one uplink transmission beam; sending first resource information to the first UE; then receiving identifier information, sent by the first UE using at least one first uplink transmission beam on a first resource, about the first UE; sending second resource information to the first UE; then receiving uplink information sent by the first UE using the at least one uplink transmission beam on a second resource; then according to the uplink information sent by the first UE, determining at least one second uplink transmission beam from the at least one uplink transmission beam; and sending to the first UE information about the at least one second uplink transmission beam.