Liquefied petroleum gas (LPG) is an important energy which is widely used in various fields of the national economy, and is one of the top 10 dangerous chemicals with inflammable, explosive dangerous. According to the need of LPG combustion and rescue, a set of LPG fire radiation experiment device was designed. The temperature and heat radiation flux of LPG flame can be gotten under different pressures and flow rates. The design is benefit for combustion and and emergency rescue research of large LPG tanks.