NOVELTY - Fast and efficient biogas production process using kitchen waste comprises: (i) uniformly mixing e.g. Clostridium to obtain complex microbial inoculum; (ii) sorting out kitchen waste, removing impurities, crushing, acidifying in an acidification tank, adopting two-phase continuous anaerobic digestion process by passing the acidified kitchen waste feed solution into an anaerobic fermentation tank; and (iii) inoculating 30 vol.% complex microbial inoculum into an anaerobic digestion tank and digesting to discharge fermented biogas from anaerobic fermentation tank.    USE - Used as biogas production process using kitchen waste.    ADVANTAGE - The method is simple without stringent production conditions and suitable for different biogas production scales.    DETAILED DESCRIPTION - Fast and efficient biogas production process using kitchen waste comprises: (i) uniformly mixing 17-19 pts. Clostridium (DSM19732), 120-130 pts. Streptococcus thermophilus (DSM22681), 85-93 pts. Coprothermobacter proteolyticus (DSM5265), 23-25 pts. Bacillus stearothermophilus (DSM14523), 16-18 pts. Thermobrachium celere (DSM8682), 11-13 pts. Actinokineospora riparia (DSM21630), 127-141 pts. Syntrophomonas (DSM4212), 470-520 pts. Methanothermobacter thermautotrophicus (DSM1053), 190-210 pts. Methanosarcina thermophila (DSM1825), 166-182 pts. Methanomassiliicoccus luminyensis (DSM25720) and 19-21 pts. Methanobacterium (DSM3637) to obtain complex microbial inoculum, where the concentration of each strain is 1-4x 108 cells/ml; (ii) sorting out kitchen waste, removing impurities, crushing, then acidifying in an acidification tank, adopting two-phase continuous anaerobic digestion process by passing the acidified kitchen waste feed solution into an anaerobic fermentation tank, where the material from acidification tank is discharged once a day, and the material from anaerobic fermentation tank is discharged 1-3 times a day; and (iii) inoculating 30 vol.% complex microbial inoculum into an anaerobic digestion tank and digesting to discharge fermented biogas from anaerobic fermentation tank.