The invention discloses a nitrogen-added cracking reactor for treating carbon tetrachloride. The nitrogen-added cracking reactor for treating carbon tetrachloride comprises a to-be-treated-solution inlet pipe, an agent adding pump, heating pipes, V-shaped deflectors, U-shaped deflectors, sulfuric acid spray pipes, a central controller, a solution outlet, a buffer chamber, a cracking generator, a sulfuric acid distribution chamber, a sulfuric acid pipe and flow guide channel plates, wherein the to-be-treated-solution inlet pipe is located at the bottom of the nitrogen-added cracking reactor, the V-shaped deflectors are located at the inner bottom of the nitrogen-added cracking reactor and are located above the to-be-treated-solution inlet pipe; and each V-shaped deflector consists of a plurality of V-shaped baffles with V-shaped openings arranged equidistantly in a horizontal mode. The device has the following advantages: (1) the device has a reasonable and compact structure, has noveland reasonable treating technology, has high purification efficiency, and has a wide application range; and (2) the device has high treating efficiency, and has a higher purification ability improvement rate than similar products.