The invention discloses a downlink frequency offset pre-correction method and device which are used for avoiding occurrence of speed reduction of data transmission at the UE (User Equipment) side caused by inconsistent frequency offset of received signals when high-speed moving UE (User Equipment) is located between two RRU (Remote Radio Unit) with a certain remote interval, and the throughput of the high-speed moving UE is improved. The method comprises the steps of determining an RRU currently requiring frequency offset pre-correction in a cell and determining a downlink frequency offset pre-corrected value corresponding to the RRU currently requiring frequency offset pre-correction according to the power of a signal which is sent by each piece of UE and received by each RRU in the same cell and the frequency offset of a signal which is sent by each piece of UE and received on each RRU; and performing frequency offset pre-correction on downlink data by using the RRU according to the downlink frequency offset pre-corrected value corresponding to the RRU currently requiring frequency offset pre-correction, and then sending the pre-corrected downlink data.