An auxiliary frame for side mounting of equipment comprises a supporting frame and a plurality of equipment connecting devices mounted on the supporting frame, and a plurality of limiting devices forcarrying tanks are arranged at the bottom of the supporting frame. Wherein a plurality of mounting holes for equipment connection are formed in the equipment connecting device; the limiting device isprovided with a downwards-concave limiting groove. According to the utility model, in the construction process, auxiliary equipment can enter the module from the side surface to be installed, so thatthe difficulty of side-entry installation work of the equipment is greatly reduced; and moreover, the construction efficiency is greatly improved, and higher safety guarantee and construction processprotection are provided for the whole construction operation.