NOVELTY - Compost inoculants comprise 1.0asterisk108-5.0asterisk109 colony forming unit/ml Pichia pastoris VT-21 strain, 1.0asterisk108-5.0asterisk109 colony forming unit/ml Bacillus subtilis, 5.0asterisk108-1.0asterisk109 colony forming unit/ml Pseudomonas B5-16 strain, and 5.0asterisk108-1.0asterisk109 colony forming unit/ml Pseudomonas B6-15 strain.    USE - Compost inoculants used for increasing organic fertilizer efficiency (claimed).    ADVANTAGE - The highly stable compost inoculants have high biological activity.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing compost inoculants, which involves:    (A) inoculating Pichia pastoris VT-21 strain onto slant culture medium, and then culturing at 28-30 degrees C for 1-2 days;    (B) inoculating Bacillus subtilis in liquid medium, and then culturing at 25-35 degrees C for 2-3 days;    (C) inoculating Pseudomonas B5-16 strain onto potato dextrose agar in liquid medium , and then culturing at 37 degrees C for 1-2 days;    (D) inoculating Pseudomonas B6-15 strain onto potato dextrose agar in liquid medium, and then culturing at 37 degrees C for 1-2 days;    (E) inoculating certain amount of Pichia pastoris VT-21 strain activated cells into seed liquid medium, and then culturing at 25-35 degrees C under 160 revolutions per minute in an incubator shaker for 2-3 days;    (F) inoculating certain amount of Bacillus subtilis activated cells into Luria-Bertani liquid medium, and then culturing at 25-35 degrees C under 160 revolutions per minute in an incubator shaker for 2-3 days;    (G) inoculating certain amount of Pseudomonas B5-16 strain activated cells into Luria-Bertani liquid medium, and then culturing at 37 degrees C under 170 revolutions per minute in an incubator shaker for 1-2 days;    (H) inoculating certain amount of Pseudomonas B6-15 strain activated cells into Luria-Bertani liquid medium, and then culturing at 37 degrees C under 170 revolutions per minute in an incubator shaker for 1-2 days;    (I) calculating optical density of obtained Pichia pastoris VT-21 strain cells, Bacillus subtilis cells, Pseudomonas B5-16 strain and Pseudomonas B6-15 strain in their respective cultured medium, and then stopping the incubation reaction, when the optical density value reaches between 3.0-4.0;    (J) performing secondary seed culture, where Pichia pastoris VT-21 strain cells, Bacillus subtilis cells, Pseudomonas B5-16 strain and Pseudomonas B6-15 strain are recultured in their respective cultured medium, and then calculating optical density of obtained Pichia pastoris VT-21 strain cells, Bacillus subtilis cells, Pseudomonas B5-16 strain and Pseudomonas B6-15 strain in their respective cultured medium, and then stopping the incubation reaction, when the optical density value reaches between 3.0-4.0;    (K) inculating first Pichia pastoris VT-21 strain cells and Bacillus subtilis cells into fermenter, and then performing fermentation for a day, followed by inoculation of Pseudomonas B5-16, and then performing fermentation for 2 days; and    (L) inoculating Pseudomonas B6-15 strain into the fermenter, and then performing fermentation for 2 days to obtain the desired compost inoculants.