Abstract: The thermal stability of the soliton excited in the protein molecular system which work at finite temperature and a nonlinear vibration of the molecular chain have been studied in our theory. The results obtained show that the soliton moves in supersonic velocity and the amplitude of soliton depends on the temperature and the strengthen of nonlinear vibration. but the soliton excited is thermal stable in the case of the physiologic temperature 310K.

Key words: soliton, energy transport, temperature effect, protein molecules