The workability and compressive strength of hybrid polypropylene fiber （PPF）-recycled tyre steel fiber （RTSF） ultra-high performance concrete （UHPC） were tested after exposure to elevated temperatures. The results show that the 0.9% volume fraction of PPF can prevent from spalling of UHPC during heating process. The compressive strength increases and then decreases with the increasing temperature， reaching its maximum value after being treated at 400 ℃， which is 9.2%-19.9% higher than that after being treated at 20 ℃. After the same temperature effect， the compressive strength of UHPC decreases with the increases of PPF volume fraction. PPF effectively adheres to the matrix before fiber melting， and can play a bridging role with RTSF. After fiber melting， PPF forms channels in the matrix， improving the high temperature resistance of UHPC.