A newly developed multivariable decoupling ball- mill coa-l pulverizing system of 300MW power station is introduced in this paper. A new strategy is proposed which uses fuzzy control and neural decoupling control, with fuzzy to be used against bad errors, and neural decoupling control to be used for slight errors. With the field application made, it has been proved that the system can effectively solve the problem of long delay and strong coupling in the ball mill coal pulverizing system.