Abstract: Perceptual training was found to reduce variability of primary visual cortex (V1) in rhesus monkey neuron response among different trials with identical stimulus, indicating response to the same stimulus became more stable．Meanwhile, correlation between neuronal activities was found to be decreased, indicating that activities between neurons became more independent, and perceptual training increased the dimensionality of neural population, thus improved capacity of neuronal representation information．Therefore, perceptual training increased stability of neuronal response to stimuli, reduced redundant neural activities, increased capacity of neuronal information representation, and improved perceptual ability．