NOVELTY - A method for producing biodiesel with plant seed and fruit comprises: (1) selecting, drying, crushing plant seed and fruit; (2) adding short-chain alcohol and Fatty Acid Methyl Ester (FAME); mixing; (3) adding the weak alkali substance into the suspension in (2); mixing; (4) dissolving potassium hydroxide (KOH) or sodium hydroxide (NaOH) into methanol; adding methanol of KOH or NaOH, refluxing; (5) cooling; press filtering; (6) static separating; (7) doing normal-pressure distillation; and (8) distilling and obtaining the standard biodiesel.    USE - Method for producing biodiesel with plant seed and fruit (claimed).    ADVANTAGE - The method for producing biodiesel with plant seed and fruit is simple, has high plant oil utilization rate, good technical economical efficiency, and it has the large-scale popularization application foreground.    DETAILED DESCRIPTION - A method for producing biodiesel with plant seed and fruit comprises: (1) selecting, drying, crushing plant seed and fruit; (2) feeding the crushed material into the reaction kettle with the shearing mixing device (above 300 rotations/minute (rpm)); adding short-chain alcohol and FAME; carrying out high-speed shearing mixing at room temperature for 1-4 hours to form the even suspension; (3) adding the weak alkali substance into the suspension in (2); and carrying out the high-speed mixing for 1-4 hours; (4) dissolving KOH or NaOH into methanol; adding methanol of KOH or NaOH with 8-10 mass% as the catalyst into the suspension in (3), carrying out the reflux reaction at 50-120 degrees C for 0.5-4 hours; (5) cooling to 40 degrees C; press filtering, obtaining the separated filtered liquid; putting aside the filtered cake; (6) carrying out the static separation to the separated filtered liquid to separate out the lower side products as glycerin and obtaining biodiesel crude product; (7) carrying out the normal-pressure distillation to the biodiesel crude product, recycling the superfluous short-chain alcohol; and (8) after molecular distillation, obtaining the standard biodiesel.