The authors have determined magnetic fabric parameters of the complex granite in Wangyunshan with the purpose of analysing dynamic state of the granite in the process of emplacement. Changes of tectonic environments, composition of the dark minerals in the rock units and basification of the granite in the process of emplacement find expression in changes of magnetic capacities. The attitude of magnetic foliation, which clearly suggests the emplacement of the magma in different tectonic units, is consistent with rock shapes and distribution of rock units. Magnetic lineations indicate emplacement centers of the granite, and different lineations imply different ways of emplacement and tectonic stress. Magnetic lineations of the magma in the early period were altered by those in the late period, and direction of magnetic lineation shows primitive flowing state of the magma. The strain state of the emplaced magma is shown by ellipsoid parameters, and distribution of stress field of the magma reflects the ways of emplacement and tectonic environment. Mechanism of granite emplacement reflected by regional structure, wallrock structure and other structures is substantiated by magnetic fabric parameters of the granite.