The invention relates to a device for recycling and purifying acid mist of a pickling line. The device comprises an acid mist absorption assembly, a mixing tower, a condensation tower, an acid liquor recycling tank and an induced draft fan. A gas outlet of the acid mist absorption assembly is communicated with a gas inlet in the lower portion of the mixing tower and connected with a gas outlet of a roasting furnace. A gas outlet in the upper portion of the mixing tower is connected with a gas inlet in the lower portion of the condensation tower, and a gas outlet in the upper portion of the condensation tower is connected with the induced draft fan. According to the device for recycling and purifying acid mist of the pickling line, an atomizer is introduced into the mixing tower for the first time, acid mist and water mist are mixed to be subjected to cooling absorption, acid mist can be recycled and can be cooled, the dual effects are achieved, and purifying efficiency is improved.