Objectives: In children with spastic hemiplegia, sensorimotor disorder cause inability to do many manual skills, followed by the restriction on doing daily activities and assignments. Because of the important role of manual skills in children’s adaptation to the environment and independence in daily life activities, development of these skills is of great importance. The present research aimed to study the effect of sensorimotor training on improving hand function in children with spastic hemiplegia. Experimental design: The present research is a single-blind experimental study. Participants: 40 children with cerebral palsy (spastic hemiplegia) aged 4-12. In the control group, 20 children spastic hemiplegia will receive conventional training on hand function including stretching, strengthening muscles, and fine movements of hands 3 sessions a week for 4 weeks. In the intervention group, 20 other children with spastic hemiplegia, in addition to conventional training on hand function, will perform sensorimotor exercises 3 sessions a week for 4 weeks (each session will last 1 hour). Treatment will be based on the principles of sensory retraining and further use hands. However, unlike the traditional retraining methods in which hands are mainly passive during the intervention, this training requires active and exploratory movements of hands. It should be noted that the sense of sight will be eliminated in order to further stimulate the sensory function of hands. These exercises include detection of objects and their weight, texture, and temperature, manipulation, and subtle movements. Participants of both groups will be evaluated before and after the intervention and a follow-up measurement will be performed in the intervention group one month after the intervention. primary and secondary assessment is Stereognosis, Proprioceptive, Purdue pegboard, MAS, Nine Hole Peg Test.