Abstract: A portable clamping apparatus for mobile equipment, which comprises a clamping assembly, a holding assembly and a tube-pole assembly used to connect other assembly, the holding assembly is configured on the bottom of the tube-pole assembly to secure others assembly, wherein the clamping assembly comprises a main body configured with a lower fixing end on its lower position, and a moveable mechanism configured on the main body, comprising several connecting rods and elastic parts used to reset the connecting rods; an upper end of the connecting rods is provided with an upper fixing end corresponding to the lower fixing end; the tube-pole assembly is connected to the clamping assembly by means of a platform assembly comprising a platform base, connecting brackets hinged to the platform base and an adjusting mechanism used to establish connection with clamping assembly and adjust the connecting rods to slide upwardly or downwardly is provided.