Taxkorgan complex, mainly composed of alkaline syenites and subalkaline granitoids, is the largest Cenozoic alkaline complex in Pamirs region. Based on geography and geochemistry of the rock-forming minerals in Kuzigan intrusion, this paper discusses the classification, intergrowth, and crystalline sequence of minerals. The mineralogical characteristics suggest that different rock types of Kuzigan intrusion are products of the same magma, and that the magma, instead of being affected much by fractional crystallization, has dominantly experienced equilibrating crystallization. According to temperature, pressure, and chemical evolution of mineral crystallization in the magma chamber, it is held that the magma of intrusive rocks ascended rather fast and was emplaced at the relatively shallow place.