The invention discloses an intelligent control system of a foam concrete preparation machine. The intelligent control system comprises a human-computer interface component, a central controller component, a raw material metering component, a raw material power control component, a raw material flow monitoring component and a fluid power output control component. The human-computer interface component is connected with the central controller component. The central controller component is in signal connection with the raw material metering component, the raw material power control component, theraw material flow monitoring component and the fluid power output control component. An automatic control manner of intelligent information processing, intelligent information feedback and intelligent control decision making is adopted, only technical parameters such as the foam concrete wet density, the foam density, the mix proportion and the yield need to be input during use, after equipment is started, a control system automatically controls feeding, metering and stirring of raw materials, the output quantities of neat paste, a foaming agent, foaming agent dilution water and compressed gas are dynamically adjusted, and electronic metering, automatic control and intelligent adjustment are fully realized.