Correcting signal sending method and base station

The invention discloses a correcting signal sending method and a base station. The correcting signal sending method includes that in a time division duplex system, when a first remote radio frequency unit of a first base station and a second remote radio frequency unit of a second base station need joint correction, the first base station selects a non-pilot time slot of down-link pilot time slots DwPTS of a radio frame to serve as a joint correcting signal sending time slot, wherein the length of the non-pilot time slot is larger than or equal to the length of two OFDM marks; the first base station sends the joint correcting signal to the second base station in the selected non-pilot time slot. Because the length of the non-pilot time slot in the DwPTS is larger than or equal to the length of two OFDM marks, the non-pilot time slot is enough to meet the joint correcting signal sending quality requirement.