Afghan's interference of the Soviet Union in 1979 made anger worldwide and demonstrated a definitive minute in the universal political situation. Soviet imperialism strategy when tested the security of Pakistan, it showed up as a front - line nation and the primary course to give help to Afghan Mujahedin. This paper has logically surveys the Pakistan's choice to join 1979 Afghan war and assessed how it profited financial and barrier states of Pakistan. All the while, the article exhibits how this Afghan war postured grave dangers to security (inside and additionally outer) of the nation because of outsiders surge that came about not just in complicated situation regarding the economy, governmental issues, and society yet in addition delivered organic challenges. Afghan refugees caused deforestation for their food, battered soil, propped up Kalashnikov culture, illegal drug trade, and other infinite law and order troubles. However, Pakistan had no better option except to take part in the Afghan war.