Psychology is a product which is generated by cerebra activity under the influence of objective reality. According to the research on children psychological development, after the young child was born, under continuous influence from outside stimulation, the internal structure and function of the brain developed rapidly. The conditioned reflex formed on the basis of non-conditioned reflex, which is the beginning of mental activity. Baby starts to make special "happy naive reaction" to his mother in the second month after he was born. He watches his mother's face, his hands and feet are moving heedlessly, smiles. The understanding between mother and child is gradually deepening and sentiment engendered, hence satisfy with baby's need. Being in hospital will interrupt the process of establishing sense of trust between infant and mother. And at the same time, outside stimulation and the movements of hands and feet which baby needs are restricted. The development of feeling and movement will be affected to a certain extent.