Purpose: 1.Increase muscle endurance of large muscle groups 2.Strengthen cardiopulmonary function 3.Use water resistance to achieve muscle strength training of limbs 4.Improve flexibility of trunk and limbs of children with cerebral palsy 5.Improve balance function 6.Strengthen coordination ability 7.Avoid lower limb joint movement injuries Assessment: Selective training according to assessment results Training intensity: 1.According to the subjective feeling of the child 2.Select the appropriate intensity when exercising Exercise intensity (the most appropriate exercise intensity should be at 50% to 80% of the maximum intensity) Training method: therapist guidance + active training of the child Session length: 30-40 minutes Water depth: 80-3000cm Water temperature: 28-34°C