Liquid filler for liquefied natural gas vehicle

A liquid filler for a liquefied natural gas vehicle comprises a liquid filling pipeline, a liquid return pipeline, an air return pipeline, a compressed air pipeline, a base and a control device, wherein the liquid filling pipeline comprises a liquid inlet connector, a stop valve a, a flowmeter, a pneumatic cut-off valve a, a liquid filling hose and a liquid filling gun; the liquid return pipeline comprises a gun insertion seat, a non-return valve b, a safety valve, a stop valve b and a liquid return opening; two pipelines connected in parallel are arranged between the liquid return pipeline and the liquid filling pipeline; the air return pipeline comprises a non-return valve a, an air return gun hose and an air return gun; the compressed air pipeline comprises a compressed air inlet, an air gun hose and an air gun; the base has a rectangular plate structure; all the pipelines are fixed with the base; and the control device is a touch screen type computer, and is connected with the flowmeter, a pressure sensor and an electromagnetic valve through a conducting wire. The liquid filler has the advantages that a skidded structure is adopted, precooling, metering, safely diffusing and urgently cutting off are integrated, the structure is compact, the movement is convenient, the investment cost is low, the suitability is strong, and the use is convenient.