Carbon nanorods were produced with a yield of about 90% by the copyrolysis Of C6H6 and CA at 600 degreesC under the cocatalysis of Fe and Mg. Many novel Y-junction carbon nanorods were found in the products. The obtained carbon nanorods have a diameter in the range of 200-350 nm and are several micrometers in length. The effects of reactants, catalysts, and the temperature were investigated, and the experimental results indicate that C5H6 and cocatalysts Fe and Mg play crucial roles in the formation of carbon nanorods. The possible formation mechanism of the carbon nanorods is discussed.