An LNG (Liquefied Natural Gas) explosion-proof gas supply control system of a yacht comprises a gas supply device and a control device, wherein the gas supply device comprises an LNG storage bottle; a storage bottle safety circuit is arranged outside the LNG storage bottle; the storage bottle safety circuit is a circuit formed by serially connecting a supercharger, a main safety valve and a sub safety valve in sequence; the storage bottle safety circuit is connected with a control unit CPU (Central Processing Unit); the LNG storage bottle is connected with an engine of the yacht through a safety pipeline; a pipeline safety valve, a carburetor, a pipeline pressure regulating valve, a pressure stabilizing chamber and an electromagnetic valve are connected in series with the safety pipeline in sequence; the pipeline safety valve, the pipeline pressure regulating valve and the electromagnetic valve are all connected with the control unit CPU; and the control device comprises an embedded control assembly and an external control assembly. The LNG explosion-proof gas supply control system of the yacht, provided by the invention, has the advantages of simple and compact structure, safety and reliability in operation, convenience in operation and simplicity in maintenance.