Religious and cultural relationships between Persians in India and Iranian Zoroastrians

The survival of Zoroaster so far, despite the numerous problems and obstacles which its followers have encountered with in different periods of time, particularly afterthe collapse of Sassanid dynasty,is significant and considering the relations of Zoroastrians after Islam's entrance to Iran can be a guide to this matter.
In the presentstudyit has been attempted to considerreligious and cultural relations between Persians of India and Iranian Zoroastrians, along with its manner and to mention the advantages of these relations for the followers of that religion in India and Iran and also its consequences.Studies demonstrate that between Persians of India and Iranian Zoroastrianshad been in persistent relationships. Although in some periods these two religious communities could have been unaware of each other due to inlandor political anarchy,they would begin their relationships in various fields as soon as the political and social peace would have appeared. The religious and cultural relationships between the two nations, which were established to help the Persians of India,continued to help IranianZoroastriansin recent centuries and it caused this ancient religion to keep its identity and rules.This research has been conducted using descriptive-analytic method and written historical resources.