The invention relates to a liquified natural gas efficient gasification supercharger. The liquified natural gas efficient gasification supercharger comprises a liquified natural gas low-temperature storage tank, a liquified natural gas pump, an ultrasonic generator used for generating ultrasonic waves to liquified natural gas in the liquified natural gas low-temperature storage tank and a gas conveying pipeline; a gas and liquid separator is arranged in the liquified natural gas low-temperature storage tank; an inner cavity of the liquified natural gas low-temperature storage tank is divided into a gas and liquid mixing cavity and a gas cavity through the gas and liquid separator; the liquified natural gas pump is connected with a liquified natural gas original gas station and a liquid inlet of the liquified natural gas storage tank through a liquid conveying pipeline; and the gas conveying pipe is connected with a gas outlet of the liquified natural gas low-temperature storage tank. The liquified natural gas efficient gasification supercharger is low in construction cost, the liquid and gas conversion efficiency is high, stability is high, controllability is high, and compared with liquid and gas conversion carried out through water bath heating, the energy cost is low, and the automation degree is high.