The invention discloses a preparation method for photo-reduction amino graphene taken as a counter electrode of a dye-sensitized solar cell. A graphene oxide water solution is oxidized by ozone and dried in a vacuum condition; a solvent and strong ammonia water are added to a glass bottle containing ozone-oxidized graphene oxide sheets, and ultrasonic dispersion is carried out for 0.5-2h; the opened glass bottle is moved into a polytetrafluoroethylene liner containing strong ammonia water to be subjected to a reaction in an autoclave for 10-18h, and the product is separated and dried to obtain amino graphene; and the obtained amino graphene is dissolved by isopropanol, the conductive glass is coated with the processed amino graphene in a blade-coating manner, and then the conductive glass is subjected to illumination. The preparation method is simple in process, mild in conditions, low in energy consumption, low in energy consumption, free of a high-temperature carbonization process, relatively high in nitrogen content and high in conductivity; and in addition, the photoelectric conversion efficiency of the assembled dye-sensitized soar cell is relatively high and is basically equivalent to that of a Pt electrode, so that the photo-reduction amino graphene is a highly potential substitute material for the counter electrode of the dye-sensitized solar cell.