Objective To evaluate the value of MRI in the diagnosis of children with cerebral palsy and significance. Methods Were retrospectively analyzed in May 2013 to January 2013 in our hospital treatment and diagnosis of CP children with 25 cases, MRI imaging to its classification and summarize clinical classification analysis. Results all 25 cases of CP children with normal by MRI examination results for 6 cases, abnormal for 19 cases, total positive rate was 76%. Based on radiographic classification will be divided into cerebral palsy, 12 cases of cerebral white matter lesions (48%), the subcallosal sacral body lesions in 5 cases (20%), softening oven in 3 patients (12%), 2 cases of brain atrophy (8%), 6 patients with brain lesions in children with CP, white paper for quadriplegics, 1 case for double collapsed, 2 cases of hemiplegia, 1 case for low muscle tone, 2 cases of mixed type; Subcallosal sacral body lesions in 5 cases, 3 cases of tetraplegia type, 2 cases as the tension is low; Basal ganglia softening oven in 3 cases, 1 case of quadriparesis, 2 cases of hemiplegia; Brain atrophy in 2 cases were presented with tetraplegia. Spasm, double paralysis, hemiplegia type tetraplegia positive rate were 80%, 100%, 80%, reducing muscle tension type positive detection rate of 75%, mixed type positive detection rate is 66.6%. Conclusion MRI can be used as a check of pathological changes of the brain and the nature of the preferred method, can be exactly indicate the nature of brain lesions, location and scope, analysis on the cause of children with CP, guiding medication and judging the prognosis has important value, suitable for clinical use.