Basic Life Support (BLS) is the recognition of sudden cardiac arrest and activation of the emergency response system, followed by resuscitation, and rapid defibrillation. Research suggests that policemen have the poorest knowledge and practice regarding basic life support. The study aim is to improve the knowledge and practice of policemen regarding basic life support to save the life of people during Cardiac arrest or any Emergency situation. Material and Methods: A pre-experimental study, using basic one group pre-test post-test design adopted for the current study. On probability purposive sampling technique methodology was chosen to select 60 policemen participants for the study. Results: The findings of the study revealed that mean post-test knowledge score (22.95±2.629) was greater than the mean pre-test knowledge score (11.81±3.68) with the mean difference 8.13, hence it shows the effectiveness of demonstration in terms of knowledge regarding basic life support (p<0.05). Mean post-test practice score (9.15±1.288) was greater than the mean pre-test practice score (5.2±0.996) with the mean difference 4.20, hence it shows the effectiveness of demonstration in terms of practice regarding basic life support (p<0.05).