We have designed and produced a quenching furnace of high temperature in order to do the experiment of melting rocks. The furnace is composed of three parts: furnace body, support body and quenching pool. This furnace is mainly made of silico-carbonic tube, overlight foam bricks and refractory ceramic cot- ton. By adjusting and testing, the temperature of the furnace sustains 1350℃ and generally 1250℃.The constant temperature region of the furnace tube is large, and the temperature gradient is very low.It heats up fast and homogene- ously. The heat preservation of the furnace is better. The power consumption is less. It can resist oxidation and generally need not be protected with any attac- hed gas. There are tracks for elevating and subsiUiing the furnace body, a work table and four bottom wheels in the support body. Therefore, it is easy to oper- ate. We only spent ¥ 700 yuan to produce this furnace. So it is quite cheap in comparison with the quenching furnace of high temperature made of platinum wire. Besides, the furnace will satisfy the melting experiments of ordinary ig- neous and metamorphic rocks at an atmospheric pressure and high temperature, thus, is economical and practical.