Based on the combination of GHZ particles and single photon, a quantum secure direct communication protocol is proposed. In this protocol, Alice encodes the information, and then divides all GHZ particles into three parts: S1, S2 and S3. Firstly,Alice sends S1 to Bob and detects the channel security. Secondly, mixes S2 with single photon SS and sends to Bob and detects the channel security after rearranging and adding decoy particles in order. Thirdly, mixes S3 with SSand repeats the previous operation. Finally, Bob measures the information and decodes it. This protocol can save the complex unitary operation, simplify the implementation process of the protocol, and at the same time, the combination of sequence rearrangement and decoy particles ensures the security of the protocol. In addition, the mixing of single photon and GHZ states makes it possible to load 4 bits classical information on a quantum state, which greatly increases the coding capacity and transmission efficiency.