Provided are a method and apparatus for obtaining information and sending information, terminal, base station and storage medium. The method for obtaining information includes: performing, by a terminal, a blind detection on transmission indication information according to a case where a size of an antenna port field in the transmission indication information has a maximum value; or performing, by the terminal, the blind detection on the transmission indication information according to a larger size between a size of the antenna port field corresponding to the mapping type one and a size of the antenna port field corresponding to the mapping type two.