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Heat balance formula of red bayberry was developed. The air flow and temperature field heterogeneity’s properties of flow field in refrigerated transport carriage’s physical model and the distributions of flow field and temperature field in cross sections and longitudinal sections were analyzed. The wind direction of top right adiabatic gas curtain was set perpendicular to isothermal curves to control the gas curtain fan with constant speed intermittently based on coordination principle. The test data of refrigerated transport carriage showed the highest temperature in cross sections dropped from 3.8℃ to 1.67℃, the biggest standard deviation amplitude of temperature values was 0.387 in three cross sections with length direction. The results indicated that only accelerating the gas curtain fan’s speed could not improve the temperature distribution homogeneity effectively, opening the adiabatic gas curtain and adjusting the wind direction in included angle of gradient direction of isothermal curves and tangent direction of flow line based on cooperative principle could improve the temperature distribution homogeneity effectively. 