Serial bus equipment and data transmission method thereof

The invention discloses serial bus equipment and a data transmission method thereof, and relates to the field of computer communication. The serial bus equipment disclosed by the invention comprises a transceiving module, a link detection module and a control state machine module, wherein the transceiving module establishes a differential clock channel and a plurality of differential data channels with opposite-end equipment; the link detection link detects the states of the differential clock channel and each of the differential data channels according to a received link detection command; and the control state machine module initiates the link detection command to the link detection module, repairs the differential clock channel when the link detection module detects that the differential clock channel fails, starts in-band resetting when the link detection module detects that any differential data channel fails, eliminates differential channels which fail, and performs data transmission after recombining remaining differential channels. The serial bus equipment and the method of the embodiment of the invention have the characteristics of high speed, low delay, link detection adaptability, expandability, intelligentization, automatic resetting and the like.