Tank booster pry is realized by using automatic booster regulating valve and self-pressurized air temperature gasifier. When the pressure in the tank is lower than the set opening value of the automatic booster valve, the automatic booster valve opens, and the cryogenic liquid (LNG) in the tank flows into the self-pressurized air temperature gasifier by the liquid level difference (the installation height of the self-pressurized air temperature gasifier should be lower than the low liquid level of the tank).