The invention discloses a solar panel, comprising two or more than two photoelectric conversion materials, wherein one of the photoelectric conversion materials is a multi-component compound photoelectric material; wherein the multi-component compound photoelectric material is gallium arsenide, indium phosphide, silicon carbide or gallium nitride. Moreover, the invention also discloses a solar mobile terminal power supply device comprising the solar panel, also comprising a solar battery working circuit; the solar battery working circuit comprises an output control module, a current detectingmodule, a display module and a battery. The solar panel according to the invention has high conversion rate and excellent performance price ratio, capable of providing stable pressure; being set on the mobile terminal, it can effectively improve the working efficiency of the mobile terminal.