Mobile phone outer casing

The utility model provides a mobile phone outer casing, which comprises a shell and a sensing antenna which is arranged on the shell, wherein the sensing antenna comprises a coil, and a first terminal and a second terminal, which are respectively connected with two ends of the coil. Through the mobile phone outer casing, and by utilizing the coil and a neck in the mobile phone outer casing, a mobile payment function of mobile phones of different structures can be realized, and the mobile phone outer casing is particularly suitable for the mobile phone similar to the structure of iPhone.