The present invention provides a training beam transmission method, an apparatus, and a system. The training beam sending method includes: determining, by a transmit end, a training beam set to be sent to a receive end; sending, by the transmit end to the receive end, indication information indicating a combination vector of the training beam set; and sequentially sending, by the transmit end, training beams in the training beam set to the receive end. According to the training beam transmission method, the apparatus, and the system that are provided in the present invention, overheads required for sending a training beam can be reduced.