The present study investigates the confrontation between the kings of Kish and Hormuz in the middle of the 7th and 8th centuries A.H. using historical first-hand sources. At the time, following the attacks of the Mongols, the first collapse of the political unity of Iran and then the gradual growth and strengthening of the power of local rulers and rulers can be seen. At the beginning of the 7th century, Atabakans of Fars and Seljuks of Kerman were able to dominate the northern shores of the Persian Gulf with their measures, but in the end the Ilkhans took control of the affairs by repelling them. The kings of Hormuz were one of the local governments on the shores of the Persian Gulf, who had to leave the port of Hormuz and settled in Jeron Island in order to avoid the attack of the Turkmens. At this time in the Persian Gulf, the kings of Kish and the Tayyibi dynasty, under the leadership of Malik al-Islam Tayyibi, with the help of the Ilkhans, were spending a period of commercial prosperity and political sovereignty over this waterway. The proximity of the kings of Hormuz with the kings of Kish initially led to friendly relations, but later it led to competition and finally to confrontation and conflict. During the years 692 to 725 A.H., there were many wars and peace between these kings. Finally, Amir Qutbuddin Tehmatn succeeded in defeating the kings of Kish and destroying them. The scope of these conflicts and its consequences was so wide and important that after the final victory of the kings of Homoz in these battles, the sphere of political-economic influence of the kings of Hormoz from a small island and a region limited to a wide area of the waters of the Persian Gulf and Makran Sea as well as the shores of It expanded north and south and continued until the 10th century and the arrival of the Portuguese.