Disclosed are a random access method and a communication device. The method includes determining a first scrambling sequence according to at least one of a first random access preamble index or a first synchronization signal block index. The method also includes performing a first scrambling or descrambling process on a data channel in a first message in a random access procedure according to the first scrambling sequence. The first scrambling or descrambling process includes scrambling or descrambling performed on an encoded information bit on the data channel.