The invention relates to a 
liquefied natural gas automobile 
fuel gas self-pressurization 
gas supply system and technical control, belonging to the 
mechanical field. A low temperature 
storage tank is internally fixed with a pump body which is electrically connected with one end of a 
liquid phase pipe, the low temperature 
storage tank is electrically connected with one end of a 
gas phase pipe, the other end of the 
liquid phase pipe is electrically connected with the lower end of one end of a 
carburetor, the other end of the 
gas phase pipe is electrically connected with the upper end of one end of the 
carburetor, the lower end of the other end of the 
carburetor is electrically connected with one end of a lower 
gas phase pipe, the upper end of the other end of the carburetor is electrically connected with one end of an upper gas phase pipe, the other end of the lower gas phase pipe is electrically connected with one end of a lower 
electromagnetic valve, the other end of the upper gas phase pipe is electrically connected with one end of an upper 
electromagnetic valve, the other end of the lower 
electromagnetic valve is electrically connected with a lower inlet end of a mixing pipe, the other end of the upper electromagnetic valve is electrically connected with an upper inlet end of the mixing pipe, the outlet end of the mixing pipe is fixed with the inlet end of an engine, the engine is electrically connected with a controller, and the controller is electrically connected with the lower and the upper electromagnetic valves. The pressure of the low temperature 
storage tank is 0-0.5MPa, and the pressure at the gas inlet end of the engine is 0.5-3MPa. The invention is applied for gasifying and pressurizing vehicle fuel and controlled by liquid-gas double ways of the pump body inside the storage tank.