The utility model discloses modular air condensing units support relates to a support that is used for supporting air condensing units. Its purpose is in order to provide a repeatedly usable, modular air condensing units support that the security performance is high. The utility model discloses modular air condensing units support includes by the off -premises station platform with prefabricated house stand fixed connection, install at the top of off -premises station platform and the rail guard that is connected through the bolt with the off -premises station platform, the off -premises station platform is enclosed by first angle steel, and pass through bolted connection between the adjacent first angle steel, all offer along its length direction's first hole groove on angle steel and the first back angle steel before first, a left angle steel, all offer on a right angle steel and the middle angle steel along its length direction's second hole groove, the rail guard includes preceding rail guard, right side rail guard, back rail guard and left rail guard, and pass through bolted connection between the adjacent rail guard. But this device safe and reliable reuse is applicable to the air condensing units of different specification prefabricated houses and different models.