Background: Child Abuse is a violation of basic human rights of a child. It constitutes all forms of harm either physical, emotional, sexual resulting in actual or potential harm to the child’s health and survival. Parental involvement places a very important role to educate the child in early identification and prevention child abuse. Hence the study was conducted with the aim to assess the level of knowledge and to determine the effectiveness of video assisted teaching on child abuse among mothers of preschool children. Methods: Pre experimental one group pre test and post test research design was employed with 30 samples matched the inclusion criteria and were selected by purposive sampling technique. Demographic variables were collected followed by Pre-test was done by using structured multiple choice questionnaire in interview method. On the same day video assisted teaching was given for 20 minutes. Post-test was conducted by using the same questionnaire at the end of 3rd day of intervention. Results: The result of the study reveals that there is inadequate knowledge among mothers regarding child abuse in pre-test is significant rise in knowledge after video assisted teaching at the level of p<0.05. Conclusion: The study findings concluded that there is significant improvement in the knowledge regarding child abuse after video assisted teaching programme. Same way the awareness on child abuse can be created to all school going children and their mothers to prevent the harmful effect to the children.