There is not a limit to that the states of systems on the sampling point of time take always on the switching surface in discrete sliding mode control. The chattering is easy to induce when those states go away from this surface. New determination method of control input to prevent a chattering to the discrete sliding mode control with element of uncertainty satisfying the matching condition has been proposed by Mr.Miguchi, et al. But the chattering is induced to reach the switching surface. Therefor, the control input conditions approach-ing exponentially to switching surface are discovered by defining and introducing a new nonlinear control input to solve this problem. The methods which expand the fuzzy logic systems using Back-Propagation al-gorithm to multiinput-multioutput types and infer the element of uncertainty by this algorithm are described in this paper. And the designing methods approaching exponentially to the switching surface and detering the chattering front and on the switching surface are proposed, when the control input searched in such a way is applyed to linear systems with element of uncertainty satisfying matching condition.