The invention discloses a method for preparing nano-silver particles by adopting a dried orange peel extracting solution. The method comprises the following steps that dried tangerine peels are cleaned, dried, crushed and sieved to obtain dried orange peel powder, then pure water is added, and heating and soaking, ultrasonic treatment, natural cooling and filtering are carried out to obtain the dried tangerine peel extracting solution; the dried tangerine peel extracting solution is mixed with the pure water, heating in a water bath is carried out, and then an AgNO 3 solution is added for uniform stirring; and finally, a hypochlorite solution is added, uniform mixing is carried out, then reaction at a constant temperature is carried out, and the green synthetic nano-silver particles are obtained after the reaction carried out for a period of time. According to the method, the dried tangerine peel extracting solution is taken as a reducing agent and a stabilizer to prepare and obtain the nano-silver particles, a part of effective components in the dried tangerine peels are adsorbed to the surface of nano-silver, so that the stability of the nano-silver is improved, and the potentialapplication function and value of the nano-silver particles prepared by using the method in the fields of medical treatment, environmental protection and the like are greatly increased; and meanwhile, the mode that sodium hypochlorite is added as a control agent in the synthesis process is put forward for the first time, and the synthesis reaction time is effectively shortened.