The micro-computer controlled analog direct-through electro-pneumatic braking system based on deceleration can directly use the braking deceleration as a feedback value,so the braking force can be adjusted according to difference between the target value and actual value of braking deceleration.The ideal deceleration can be consistent with braking deceleration by comprehensively balance the non-linearity variation of brake cylinder pressure,indeterminacy of comprehensively balance the non-linearity variation of brake cylinder pressure,indeterminacy of actual friction coefficient of friction pairs,and indeterminacy of road running conditions of trains(such as ramp,surves).As a result that the train can be guaranteed to be parked in a position precisely,and the comfortableness also can be guaranteed during operation of trains.