A movable tire inflation apparatus includes an inflation device and a fixing structure. The inflation device includes a casing defining an accommodation room. The accommodation room is equipped with an inflation component, and an electrical control module which is connected electronically to the inflation component. At least one magnetic positioning member is disposed at one side of the casing. The fixing structure is disposed at an outer side of the inflation device in such a manner to fix the inflation device on an outer side of a wheel and the magnetic positioning member is magnetically positioned at one side of the wheel. In this way, the movable tire inflation apparatus is fixed on the outer side of the wheel and connected to the wheel by the inflation device, to inflate a tire as the wheel is moving, providing advantages in easy carriage, repair convenience and safety improvement.