NOVELTY - Synthesizing 9-methoxy-18,19-dehydrocamptothecin by artificially inducing Nothapodytes nimmoniana (Graham) Mablerley endophyte, comprises: (a) preparing bacterial suspension liquid; and (b) carrying out artificial induction: adding inducer having concentration of 2-1500 mu M to the bacterial suspension liquid, culturing for 4-7 days, adding the inductor again which is 0.2-1.5 g/L of liquid culture medium, culturing for 3-5 days, inoculating in the PDA flat culture medium, and screening out bacterial strains for synthesizing 9-methoxy-18,19-dehydrocamptothecin.    USE - The process is useful for synthesizing 9-methoxy-18,19-dehydrocamptothecin by artificially inducing Nothapodytes nimmoniana (Graham) Mablerley endophyte (claimed).    ADVANTAGE - The process is low in production cost, low in environment pollution degree of production, low in harm to production staff, high in product yield, and high in purity.    DETAILED DESCRIPTION - Synthesizing 9-methoxy-18,19-dehydrocamptothecin by artificially inducing Nothapodytes nimmoniana (Graham) Mablerley endophyte, comprises: (a) preparing bacterial suspension liquid: culturing N. nimmoniana (Graham) Mablerley endophyte for 3-4 days in potato dextrose agar (PDA) flat culture medium, scrapping eugonic mycelium around bacterial colony by inoculating loop, inoculating to potato sucrose liquid culture medium with glass bead, culturing in table for 40-50 hours with speed of 100-150 rotations/minute at 25-30 degrees C, diluting by the potato sucrose liquid culture medium until number of bacteria is 10-4, obtaining bacterial suspension liquid; and (b) carrying out artificial induction: adding inducer having concentration of 2-1500 mu M to the bacterial suspension liquid, culturing for 4-7 days, adding the inductor again which is 0.2-1.5 g/L of liquid culture medium, culturing for 3-5 days, inoculating in the PDA flat culture medium, and screening out bacterial strains for synthesizing 9-methoxy-18,19-dehydrocamptothecin.