Abstract: This paper proposes a method of coal powder flow rate modeling using fuzzy neural network.For puffing system of furnace,the input space of the system is divided into several fuzzy operating regions,in which alocal model can represent the system; the method avoids the short coming that neural network cannot interpret the physical meaning of its associating weights. Making use of data which were sampled in practice,the accuracy is improved using this method,and work experience and expert knowledg eare used sufficiently,which has great engineering application value.