Abstract: The Yunnan Observatories of the Chinese Academy of Sciences has proposed a scientific project for in situ measurements of solar eruption and its corresponding magnetic field structure, which would carry out unprecedented close-range measurements of the solar atmosphere and intense activity. The total time close to the sun of Probe for in situ measurements of solar eruption will exceed the PSP and Solar Orbiter, and its thermal protection system will be far more difficult than the PSP and Solar Orbiter. This paper first analyzes the characteristics of the orbit environment of the Probe for in situ measurements of solar eruption, puts forward the design idea of the thermal protection, and then gives the design of the thermal protection system and the ground experiment scheme. Preliminary research shows that the design scheme of thermal protection system has the advantages of good radiation heat dissipation, high temperature resistance and high reliability.