User authentication method of electronic device

The invention discloses a user authentication method of an electronic device. The user authentication method comprises the following steps of S11, pre-storing authorized color information; S12, inputting to-be-authenticated color information; and S13, comparing the to-be-authenticated color information with the pre-stored authorized color information, executing the operation of passing the authentication if the to-be-authenticated color information and the pre-stored authorized color information are the same, and executing the operation of failing in authentication if the to-be-authenticated color information and the pre-stored authorized color information are not the same. According to the user authentication method of the electronic device, provided by the invention, many defects of an authentication method in the prior art are overcome, not only are usability and enjoyment stronger, but also the safety performance is high, and novel using experience can be supplied for a user.