his paper presents approach to design PID controllers for multi-input and multi-output (MIMO) systems. The suggest control strategy, which is central control, mix between of PID controllers. The proportional gains in the P controllers as tuning parameters of (SISO) with a view to modify the behaviour of the process nearly independently. The idea design procedure consists a decoupler including integral action is an identified, the decoupler is PID controllers, the proportional gains are tuned in order to achieve the best-specified performance. The proposed technique is applied to representativeness processes