Euler-Lagrange two-phase flow model is used to simulate the inner flow field of the tail nozzle pipe under the condition of different high accelerations and particle diameters. At the aspect of the calculation of heat transfer and temperature field, the three heat transferring modes and the respects of each interior area of the nozzle was considered, calculate and analyze the temperature field of the nozzle's three-dimensional integral heat structure. The results show that, the change of temperature grads in the nozzle's inner wall is prominence in the nozzle macrocosm; the gas temperature of the nozzle tail is higher than the pure gas phase with particles and high acceleration, but it descend rapidly in the thermal protection layer; the radiation heat temperature of the particle in different diameter and high acceleration is prominence.