Provided are a signal sending method and a signal sending device. The signal sending method comprises: eliminating interference on a boundary symbol between at least two precoding code blocks in a multiple-input multiple-output filter bank multi-carrier (MIMO-FBMC) system, wherein the precoding code blocks consist of at least one time-frequency resource element using the same precoding; precoding symbols to be sent in the precoding code blocks so as to obtain precoded symbols; and sending the precoded symbols. The present invention can fully or partially eliminate the mutual interference of precoding code blocks in the time-frequency critical location.
