The invention relates to an intelligent digital tire inflation gun and a using method thereof. The inflatable gun comprises a gun body and an air outlet connecting pipe. An air intake passage is laterally arranged in the gun body; one end of the gun body has an intake connector connected to one end of the air intake passage, the other end of the gun body is laterally provided with an air outlet passage and an air outlet connecting pipe connected to the air outlet passage; the center of the air outlet passage is connected to a controller; a vent hole communicating with the air outlet passage isformed in the outer side wall of the gun body; a vent valve assembly corresponding to the vent hole is arranged in the gun body; the air intake passage communicates with the air outlet passage, and an inflation valve assembly is arranged between the air intake passage and the air outlet passage. The invention has simple structure, adopts the unique valve assembly, has an inflation and deflation function, can preset an air pressure value, and can automatically stop during inflation.