A method for setting a graph password of a communication terminal, characterized by comprising the following steps: in a case when a setting graph password instruction of a user is received and no character password is set before, generating a graph interface with a plurality of loaded pictures, wherein, a two-dimensional lattice of the graph interface is divided into a plurality of grids, so that the graph interface is divided into the plurality of grids, and each grid has one unique coordinate, and each loaded picture is randomly filled in one grid of the graph interface; obtaining a picture identification and a coordinate value for setting a graph password by selecting at least one loaded picture in the graph interface as the picture corresponding to the graph password, wherein the coordinate value is the coordinate value of the grid where the at least one loaded picture is filled; according to a preset corresponding relationship between picture IDs, coordinate values and characters, converting the picture ID and the coordinate value for setting the graph password into a character password and storing the character password, finishing setting the graph password; further comprising: in the case when the setting graph password instruction of the user is received and it is judged that the character password is set before, converting the character password set before into the ID of the loaded picture displayed in the graph interface and the coordinate value of the grid where the loaded picture is located by utilizing the preset corresponding relationship between picture IDs, coordinate values and characters, and then obtaining the picture ID and the coordinate value for setting the graph password by selecting a displayed loaded picture from the graph interface by the user. in a case when a setting graph password instruction of a user is received and no character password is set before, generating a graph interface with a plurality of loaded pictures, wherein, a two-dimensional lattice of the graph interface is divided into a plurality of grids, so that the graph interface is divided into the plurality of grids, and each grid has one unique coordinate, and each loaded picture is randomly filled in one grid of the graph interface; obtaining a picture identification and a coordinate value for setting a graph password by selecting at least one loaded picture in the graph interface as the picture corresponding to the graph password, wherein the coordinate value is the coordinate value of the grid where the at least one loaded picture is filled; according to a preset corresponding relationship between picture IDs, coordinate values and characters, converting the picture ID and the coordinate value for setting the graph password into a character password and storing the character password, finishing setting the graph password; further comprising: in the case when the setting graph password instruction of the user is received and it is judged that the character password is set before, converting the character password set before into the ID of the loaded picture displayed in the graph interface and the coordinate value of the grid where the loaded picture is located by utilizing the preset corresponding relationship between picture IDs, coordinate values and characters, and then obtaining the picture ID and the coordinate value for setting the graph password by selecting a displayed loaded picture from the graph interface by the user. in the case when the setting graph password instruction of the user is received and it is judged that the character password is set before, converting the character password set before into the ID of the loaded picture displayed in the graph interface and the coordinate value of the grid where the loaded picture is located by utilizing the preset corresponding relationship between picture IDs, coordinate values and characters, and then obtaining the picture ID and the coordinate value for setting the graph password by selecting a displayed loaded picture from the graph interface by the user.