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Iran tud' s party fonned as the most poweiful and solidarity party in consequence of political open space after 1320 and rezakhan dictatorship collapse and could to fulfill the most influence in events of 1320-1332. this party was under the influence policy dominat element on iran northen neighbourhood. It ws pretending to defend of humen rights, actually, cooperate on the direction of the soviet republics policies. This party was cooperating and fighting with two famious politicians (Qawam-Mossadeq) in the interior, during its activity, occasionally, and finally these two politicians have used from the influence of tuder's party, spicesly.

Qawam-al-saltana tried to eITest soviet and tude's confidence and successed in this field. He could, primarly, to solve his premier periods crisis from the influence of this party, but after he understood that more power of this party confronted its governing, dangeuursly, at first, with coalition cabinet, sended out them under the pretext of tude's protest upon his agreemen on south revolutionsts and non- attendance of tude's ministers in the cabint.

Mossadeq never shared tude's party in the government, but used from the influence of this party. Although the consequences of that wasn't positive for mossadeq, tude's party helped mossadeq with demonstration during national movement. Therefor, mossadeq to enlarge tude's dangerous for america and tried to use from it spicesly upon america. More emphaesis of tude's dangeours, was caused to unit the united state and british to destruct mossadeq government. consequenty, 1332 coup data was because of that ,emphaesis.

Key words:

Comparative study, Qawam - al- saltana-,mossadeq, tude's party .