This experimental study aimed to assess the effectiveness of soft tissue manipulation and Instrument Assisted Soft Tissue Mobilization (IASTM) in alleviating calf muscle tightness in children diagnosed with spastic cerebral palsy (CP). Cerebral palsy, a condition affecting two to three out of every 1,000 live births, encompasses a range of challenges related to movement, posture, gait abnormalities, and balance issues. Specifically, spastic diplegic cerebral palsy, characterized by leg spasticity, often results in walking difficulties, with tiptoeing as a common symptom due to calf muscle tightness. The study involved 30 children aged 5-12 diagnosed with spastic cerebral palsy at ACS Medical College and Hospital. Participants meeting the inclusion criteria were divided into two groups: Group receiving soft tissue manipulation and Group B undergoing IASTM. Outcome measures included goniometry and the Modified Ashworth Scale. Random sampling was employed to select subjects, with exclusions for specific medical conditions. Written consent was obtained and demographic data were collected. Based on goniometry and the Modified Ashworth Scale, both interventions demonstrated highly significant differences in mean values within their respective groups. The findings underscore the potential efficacy of both soft tissue manipulation and IASTM in addressing calf muscle tightness in children with spastic cerebral palsy.