Abstract: Disclosed are a portable universal valve nozzle and an inflation device thereof. The portable universal valve nozzle includes a valve nozzle body composed of a first connection port and a second connection port; a valve pin arranged inside the valve nozzle body composed of a rod-shaped pin head and a hollow tubular pin body; where the valve pin is arranged inside the valve nozzle body in an axial direction in two different states; in a first state, the pin head points toward the first connection port; and in a second state, the pin head points toward the first connection port. The portable universal valve nozzle achieves convenient compatibility with both the Schrader valve and the Presta valve while ensuring good airtightness. Through two different installation states of the pin head, the portable universal valve nozzle of the present disclosure can adapt to different types of valve nozzles.