The invention discloses a method for preparing pine nut oral-liquid. Firstly, pine nuts are subjected to enzymolysis through a specific ratio of pancreatin and cellulose to obtain enzymatic hydrolysate, during enzymolysis, a certain amount of ferric salt is added, under the action of iron ions, unsaturated fatty acid obtained through enzymolysis is polymerized with the iron ions to produce polymerto increase the solubleness, meanwhile, the unsaturated bonds obtain certain protection, then, separation is conducted in an alcohol precipitation mode, sorbitan ester is added, and since the sorbitan ester has a polyhydroxy structure, the sorbitan ester reacts with the unsaturated fatty acid and water to form hydrogen bonds to further protect the unsaturated fatty acid and meanwhile improve thesolubleness. Through the method, the pine nut oil oral-liquid which is good in taste, good in solution stability and stable in active ingredient can be obtained, and the method has the advantages of being simple in preparation, controllable in preparing process and suitable for industrialization.