The study of the fields and factors of the formation and fall of the Republic of Kurdistan (Mahabad), 1946.

In January 22,1946 ,republic of Kurdistan or Mahabad was officially  announced by Ghazi.Mohammed called Pishva . Finally it was ended after a year under internal, external pressures. The crisis of Kurdistan which had been occurred due to foreign occupations, was also rooted in civil problems that emerged at the beginning of second world war.  In this research the followings have been studied in a descriptive _analytical method the formation of Kurdistan  crisis, establishment of  the republic of Mahabad and internal, external elements effective in it's emergence and decline. The research findings indicate that the discussion of Kurdistan and republic of Mahabad had caused by the situation and grounds of Rezashah period and Kurdish people movement to announce their autonomy from central government and trans-regional powers interferes and their stimulations accelerated such tribal movements.  On the other hand, structural weakness and internal problems of republic of Mahabad and those foreign countries performance have influenced the collapse of that newly founded republic. Keywords: