The paper aims to research the heat transfer characteristics of spontaneous heating products containing heat source under storage conditions based on the background of the storage task profile of radioisotope heat source product. The experiment platform of spontaneous heating product including heat source was built. The thermal state of product containing heat source under different storage conditions was studied experimentally. And the heat transfer characteristics of product with or without packaging box in or not in the wind were analyzed. The heat transfer ability of product without packaging box under windless conditions had good performance. Furthermore, the temperature of the hot sphere and spherical shells in the thicker packaging box was higher than that in the common one. The temperature of measuring points under the two conditions decreases with the increase of distance from the heat source. And the downtrend of the temperature of measuring points of the product without packaging box or with the common one decreases with the increase of the relative distance. The research results can be used as theoretic support for thermal design and later environmental thermal testing of product.