Hydrotreatment method of animal and vegetable oil

A hydrotreatment method of animal and vegetable oil comprises the following steps: vegetable oil and/or animal oil are/is mixed with hydrogen and a regulation gas, the obtained mixture contacts and reacts with a sulfide type hydrotreatment catalyst to obtain a hydrotreatment reaction resultant, the hydrotreatment reaction resultant undergoes gas-liquid separation to obtain a liquid phase hydrocarbon flow, a gas phase flow and water, and one part of the liquid phase hydrocarbon flow is recycled to the inlet of a hydrotreatment reactor. The method effectively reduces the content of CO and CO2 products in the reaction resultant, and improves the yield of liquid hydrocarbon products.