The invention discloses a tire sealing composite new material containing BN-2 tackifying resin, and belongs to the technical field of tires. The tire sealing composite new material is characterized by being produced from BN-2 tackifying resin, NR natural rubber, a cross-linking agent BPO, nanoscale kaolin particles, tung oil, carbon fibers, a rubber anti deteriorant MB, butadiene styrene rubber particles, and methyl hydroxy silicone oil. The tire sealing composite new material is mainly applied in meridian vacuum tires, can quickly realize self complementing of nicks (diameters are smaller than or equal to 10mm), and is free from drying up, free from freezing, high in reliability, good in stability, and durable (the tire sealing composite new material can be used for a long time under the environment of minus 60 to 106 DEG C). The tire sealing composite new material disclosed by the invention contains varied high molecular polymers, is in a liquid-solid coexisting tacky state in the tires, and can be stably and uniformly adhered to the inner walls of the tires for a long term, so that the dynamic equilibrium of wheels is not influenced, and the tire sealing composite new material also has the effect of zero leakage, which are actually revolutionary improvement compared with the prior art.