Uplink data transmission method and device

The embodiment of the invention provides an uplink data transmission method and device. The uplink data transmission method comprises the steps of judging whether to-be-transmitted uplink data meet an uplink transmission time sequence; if the to-be-transmitted uplink data do not met the uplink transmission time sequence, stopping transmission of the to-be-transmitted uplink data and setting a BSR (Buffer Size Report) in an effective state; generating new to-be-transmitted uplink data based on uplink authorization of a current sub-frame and sending the new to-be-transmitted uplink data. The new to-be-transmitted uplink data comprises a BSR control element; the current sub-frame represents a sub-frame corresponding to the moment when the to-be-transmitted uplink data do not met the uplink transmission time sequence is detected. The BSR control element is contained in the new to-be-transmitted uplink data, and the new to-be-transmitted uplink data are transmitted, so that a base station can distribute new uplink