In order to study the heat transfer between semi-coke and steam, a gas-solid heat transfer experimental system was established. The effects of the particle size, material layer height, steam flow on the amount of heat recovery and energy increase were analyzed. The experimental results show that with the increase of heat transfer time, the average temperature of the whole material layer decreases slowly, the effective heat transfer coefficient decreases gradually, and the amount of heat recovery and energy recovery increase. With the increase of material layer height, the reduction of particle size and the increase of steam flow, the effective heat transfer coefficient increases in the range of 3.5~52.0 W/(m²·K). The experimental relationship expressions between the particle size, material layer height, steam flow, average temperature of the whole material layer and effective heat transfer coefficient were fitted.