NOVELTY - Preparing amino acids from animal blood involves cleaning and disinfecting all equipment with ozone water. Blood is collected in stainless steel tank and anticoagulant is added to the tank. Collected blood is sterilized by UV radiation at low frequency. Fat is removed from the animal blood by mixing water and complex microbial agents to sterilized blood at constant pH. Obtained product is sterilized, mixed, and treated for bioconversion. Bio-converted product is filtered and centrifuged to separate solid, liquid or precipitate.    USE - Method for preparing amino acids used as raw material for the production of liquid fertilizer, animal fodder and powdered food (all claimed).    ADVANTAGE - The method enables to prepare amino acids that has high absorption rate, and high stability and ensures utilization of animal blood resource with high production yield. Method is cost-effective and eco-friendly.    DETAILED DESCRIPTION - Preparing amino acids from animal blood involve cleaning and disinfecting all equipment with ozone water. Blood is collected in stainless steel tank and anticoagulant is added to the tank. Collected blood is sterilized by UV radiation at low frequency. Fat is removed from the animal blood by mixing water and complex microbial agents to sterilized blood at constant pH. Obtained product is sterilized, mixed, and treated for bioconversion. Bio-converted product is filtered and centrifuged to separate solid, liquid and precipitate. Precipitated fat is removed from the blood and filtrate is collected. Collected filtrate is placed in the reaction tank for secondary bioconversion. Obtained product is sterilized by using high-frequency ultrasonic rays. Obtained product is filtered under sterile conditions for solid-liquid separation. Filtrate is sterilized by ultrasonic treatment for 30-60 minutes to obtain a solution of amino acid content of 18.66 %, which is packaged and stored at 3-6 degrees C. Amino acid solution of greater than or equal to 18.66% is spray dried to obtain amino acid powder.