The invention discloses a method for realizing regional display of a light-emitting mobile phone shell. A cover plate, a light guide plate and a reflector are included. Each light-emitting assembly comprises a plurality of LED lamp sets welded to the FPC board according to the preset distance. The cover plate is positioned above the light guide plate; ink patterns are arranged at the bottom of thecover plate; shading ink bulges are arranged at the bottom of the cover plate; the shading ink protrusions are made of lightproof white shading materials. The light guide plate is divided into different light guide plate areas according to the different ink patterns and the edges of the ink protrusions; each light guide plate area is provided with a light-emitting assembly. The invention providesan improved design method of a flash mobile phone shell with multiple pattern changes and high brightness. By utilizing the existing power supply technology of the mobile phone, different changes offlash patterns of the mobile phone shell are realized, the energy loss of light is effectively avoided, and the light intensity is improved, so that the application of the flash mobile phone shell isnot limited to night, and a better light effect can be seen in the daytime.