The invention discloses a synergistic extraction system for recovering and extracting platinum based on a solvent extraction method, belonging to the technical field of resource recovery. The method for recovering and extracting platinum is characterized by comprising the steps of forming the synergistic extraction system by adopting tributyl phosphate (TBP) as an extracting agent, 2-methoxy-phenylthiourea as a synergistic extraction solvent and isoamyl alcohol as a diluting agent; adding a 2-methoxy-phenylthiourea-hydrochloric acid solution into a feed liquid containing platinum, adjusting the acidity namely H<+> concentration to 3-5mol/L, putting the mixture in a thermostatic water bath of 30-45 DEG C for 2-4 minutes, and cooling to obtain an extraction water phase of which the platinum concentration is 0.01-5 microgram/ml; measuring quantified TBP, diluting the quantified TBP into a liquid with the concentration of 0.5-2mol/L by using isoamyl alcohol, and taking the liquid as an organic phase for extraction; and adding the organic phase and a water phase feed liquid into a separating funnel according to a volume ratio of 1:1-1:10, then oscillating for 30s to 2min, then taking the mixture out, standing for liquid separation, and performing reverse extraction on the organic phase after liquid separation. By adopting the synergistic extraction system disclosed by the invention, the cost and pollution are reduced while the extraction efficiency of platinum is improved, so that an efficient, economic and environment-friendly effect is achieved.