A fast furnace-starting method for a low-temperature boiling chlorination furnace comprises the following steps: a, when the temperature of carbide slag in the chlorination furnace reaches 200-450 DEG C, adding titanium scraps, aluminum particles or a mixture of titanium scraps and aluminum particles into the chlorination furnace, wherein the carbide slag in the chlorination furnace is 100 parts by weight while the added titanium scraps, aluminum particles or a mixture of titanium scraps and aluminum particles are 2-3 parts by weight; and b, introducing mixed gas of normal temperature chlorine gas and normal temperature non-oxidizing gas, carrying out low-temperature boiling chlorination reaction with materials in the chlorination furnace, and raising the temperature of the materials in the furnace to 450-600 DEG C, thereby finishing the starting of the furnace. The fast furnace-starting method disclosed by the invention is short in carbide slag pre-heating time and low in energy consumption, and can effectively shorten the furnance-starting time. The method not only is suitable for fast furnace start in a common condition, but also is suitable for fast furnace start after the temperature of the carbide slag is reduced as a result of faults.