The PG high-temperature classification,unrecoverable creep compliance,creep recovery rate and stress sensitivity of the bio-asphalt with different bio-oil dosages and temperatures were investigated by a high-temperature classification test and a multiple stress creep recovery test (MSCR),and the classification of the high-temperature performance of the bio-asphalt on the basis of the AASHTO MP 19 standard was analyzed.Then,the high-tempera- ture performance of bio-asphalt mixtures was verified by a rutting test.The results show that (1) the critical tem- perature of integrated asphalt rutting factor produces a significant effect on the classification of origin bio-asphalt; (2) as compared with the matrix asphalt and S100 asphalt,the bio-asphalt achieves a higher recovery rate but with a smaller creep compliance; (3) the unrecoverable creep compliance and the stress sensitivity of the creep recovery rate show no obvious rule with the change of the bio-oil dosage,while the stress sensitivity of the bio-asphalt increa- ses with the rise of temperature; and (4) 64℃ can be used as the reference temperature for high-temperature clas- sification of low-dosage bio-asphalt.