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The spectral energy distribution (SED) of TeV blazars has a double-humpedshape that is usually interpreted as Synchrotron Self Compton (SSC) model. Theone zone SSC model is used broadly but cannot fit the high energy tail of SEDvery well. It need bulk Lorentz factor which is conflict with the observation.Furthermore one zone SSC model can not explain the entire spectrum. In thepaper, we propose a new model that the high energy emission is produced by theaccelerated protons in the blob with a small size and high magnetic field, thelow energy radiation comes from the electrons in the expanded blob. Because thehigh and low energy photons are not produced at the same time, the requirementof large Doppler factor from pair production is relaxed. We present the fittingresults of the SEDs for Mkn 501 during April 1997 and Mkn 421 during March 2001respectively.

The new model of fitting the spectral energy distributions of Mkn 421 and Mkn 501