Uplink data transmission method and device

The embodiment of the invention discloses an uplink data transmission method and an uplink data transmission device, which are used for realizing a multi-antenna transmission scheme in a WCDMA system. The method comprises the following steps of: dividing a data stream of a user to be transmitted into a corresponding number of data stream according to the number of antennae; acquiring pilot frequency sequences corresponding to the data streams of the antennae, wherein pilot frequency sequences corresponding to the data streams of the antennae are mutually orthogonal; and transmitting the data stream of each antenna by using a dedicated physical data channel or enhanced dedicated physical data channel, and transmitting the pilot frequency sequence corresponding to the data stream of each antenna by using a dedicated physical control channel. The embodiment of the invention also provides an uplink data transmission device. The method and the device can realize the multi-antenna transmission scheme in the WCDMA system.