The invention discloses a method for recovering and separating platinum and palladium from a palladium-based adsorption net. The palladium-based adsorption net is cleaned with hydrochloric acid and dissolved with aqua regia, and is reduced by hydrazine hydrate after removal of the remaining acid and conversion to sodium salts. Black deposition obtained after the reduction is dissolved in aqua regia, and undergoes removal of the remaining acid and conversion to sodium salts. Then platinum is deposited with solid NH4Cl. The platinum deposition is reduced by hydrazine hydrate, then once again is dissolved in aqua regia and undergoes conversion to sodium salts, secondary deposition and secondary reduction. Chloride ions are washed away, and then high purity platinum is obtained after drying and sintering. Ammonia-water (1/1) complex is added into the liquid obtained after the first deposition of platinum, the mixture is filtered, concentrated hydrochloric acid is added to deposit palladium, then the palladium deposition is reduced by hydrazine hydrate, chloride ions are washed away, and palladium is obtained after drying. The method can reduce the process cycle from 15 days in the prior art to 10 days. The operation is easier, the chemicals are easier to obtain, no complex equipment is needed, the recovery rate reaches over 97%, and the purity of the products is up to 99.95%.