Abstract: The toluene cracking experiments were carried out in an eutectic salt reactor. Catalytic effects of NN salt (8.3%Na₂CO₃+91.7%NaOH) and NK salt (71%Na₂CO₃+29%K₂CO₃) on the toluene cracking rate, gas product yield and benzene yield were investigated. The results show that the eutectic salts have obvious catalyses on the toluene cracking. When cracking at 800℃ with NK salt and NN salt, the toluene cracking rates are increased by 27% and 46%, respectively, compared with thermal cracking. And the benzene yield is greatly reduced. When cracking with NN salt at a temperature higher than 750℃, H₂ in gas product is mainly from the reaction between NN slat and the cracking tar.