Cis-1,4-polybutadiene rubbers were synthesized with rare-earth catalyst systems (NdBR), such as Neodymium naphthenate, and Neodymium caprate. The properties including stress-strain, rebound, heat build-up, wet-skid and rolling resistance, as well as abrasion were studied, and compared with NiBR polymerized with nickel catalyst system. The results showed that NdBR had higher cis-1,4-content(>97%)than NiBR(95%). Besides, NdBR possessed higher tensile strength, rebound as well as wet skid resistance, but lower heat build-up and rolling resistance, which was better than that of NiBR. These properties would be very useful for making the green tire. The results also showed that NdBR with Nd-caprate catalyst was superior to that one with Nd-naphthenate.