The invention discloses a preparation method for a platinum and rhenium reforming catalyst and a platinum and rhenium reforming catalyst. The method comprises the steps of: (1) contacting an aluminium oxide carrier with an active ingredient solution containing a platinum compound and a rhenium compound and filtering and drying the mixture to obtain a dried sample; (2) contacting an alkyl sodium xanthate solution with the pH of 7.5-9 with the dried sample and filtering, drying and roasting the mixture to obtain a catalyst intermediate; and (3) contacting the catalyst intermediate with the ingredient solution containing the platinum compound, the rhenium compound and hydrochloric acid, and then drying and roasting the mixture. The method disclosed by the invention integrates a vulcanization process of the catalyst, so that corrosion on equipment before the catalyst is used. The catalyst is simple in production process. In addition, the platinum and rhenium reforming catalyst prepared by the method is free of pre-vulcanization process of the catalyst before the catalyst is used, and compared with a catalyst which is vulcanized by sulfate radicals, the catalyst has a better catalytic performance.