  In this paper I'm going to study the intersection of two Heegner-Drinfeld
cycles coming from two different nonsplit tori on the Yun-Zhang moduli stack of
$PGL_2$ Drinfeld stukas with Iwahori level structure. We will see that the
intersection number is related to a certain period integral. It is an extension
of the result by Howard-Shinidman to the Iwahori case.
