The per pose of this paper is to have a look at the British policy in Iran during the reign of Pahlavi 1st, which was based on two principal points. The first was to make a blockage against the penetration of socialism through Iran in order to prevent it into the Middle East and India .The second which was more important, was the security of Oil Wells and Pipe- lines and to secure the flow of oil to the Persian Golf. Both of these goals were guaranteed though out the reign of Pahlavi 1st.Then, to have a brief account on the Iranian policy at the commencement of The Second World War which was decided to pursue the policy of neutrality in the war. From the British point of view, this policy not only did not threat their goals and attack in Iran but, in fact, secured and savegarded them perfectly. Afterwards the sudden interests of the German forces on Russian territories on June 22nd 1941, upset the political and military pattern of the war derastically. The necessity of sending arms and supplies to the new ally, the Soviet Union on one hand the roads of Iran were propitious for transportation of weapons and supplies on the other hand, turned the Allies‘ attention to Iran. In order to achieve their objects, decided to follow military means and under the pretext for the threat of thousands German envoys in Iran, which was not reliable and proved, 3rd of Shahrivar 1320 sh/ 25th August, 1941 they attacked and occupied north, south and west of Iranian territories.According to the reliable sources, this paper is going to study and analyse the British policy in Iran during this priod and belived that the British Government was designer of the plan of occupation of Iran. Although Iran was considered as the “Bridge of Victory” but received neither rewards nor privileges, futher more the Iranian Government had to do as they were pleased. In fact, Iran had been made the scapegoat of the British policy towards Russia.