NOVELTY - Process for producing biodiesel by using Pistacia chinensis seed oil comprises (1) pre-treatment of P. chinensis seed oil; and (2) adding methyl acetate, compound enzyme catalyst, organic solvent and organic alkali in turn to P. chinensis seed oil pre-treated in above process, sealing, reacting, distilling to obtain biodiesel.    USE - The process is useful for producing biodiesel by using P. chinensis seed oil (claimed).    ADVANTAGE - The process for producing biodiesel by using P. chinensis seed oil has simple preparation technique, mild reaction condition without environmental pollution; the yield of the biodiesel can reach to 63.49%.    DETAILED DESCRIPTION - Process for producing biodiesel by using P. chinensis seed oil comprises (1) pre-treatment of P. chinensis seed oil: heating P. chinensis seed oil to 70 degrees C, adding phosphoric acid solution with mass concentration of 60% which occupies 0.2% of mass percentage of the oil, cooling it to 50 degrees C, adding 0.1 mol/L potassium hydroxide (KOH) solution which occupies 0.5% of mass percentage of the oil, uniformly stirring, heating up to 85 degrees C, adding saturated salt solution with 85 degrees C which occupies 3% of mass percentage of the oil, reducing temperature to 60 degrees C, standing, centrifuging to obtain supernatant yellow oily liquid pre-treated P. chinensis seed oil; and (2) adding methyl acetate, compound enzyme catalyst, organic solvent and organic alkali in turn to the P. chinensis seed oil pre-treated in above process, sealing, reacting for 10-15 hours in water bath shaking table at 45-55 degrees C, distilling the obtained product to obtain biodiesel, where P. chinensis seed oil is used as raw material and compound enzyme catalyzing to prepare biodiesel; the mass ratio of P. chinensis seed oil to methyl acetate is 1.5-2:1; the mass ratio of P. chinensis seed oil to solvent is 1:1-3; the amount of the compound enzyme is 12-55% of the mass of P. chinensis seed oil; the dosage of the organic alkali is 8-10% of the mass of P. chinensis seed oil; the compound enzyme catalyst is enzyme mixed by two of groups Candida rugosa Lipase Isoenzymes (CCL) + Lipex (Lipex 100T), Candida antarctica Lipase Novozym435 (N435) + Lipex or Candida antarctica Lipase Novozym435 (N435) + Lipozyme TLIM (TLIM); the organic solvent is tert. butyl alcohol, n-hexane or n-heptane; the organic alkali is trihydroxymethyl aminomethane or triethylamine.