Strong ductile deformation developed in Early Paleozoic granite in Wugongshan area, South China, which is the key to understand its structural styles and origin. On the basis of detailed geological survey, this paper presents measure of finite strain, calculation of kinematic vorticity and estimation of temperature about Early Paleozoic gneissic granite in Wugongshan area. Measure of finite strain for Early Paleozoic gneissic granite show the X/Z ratios is 1.33~5.07 while Y/Z is 1.17~2.59, and flinn parameters K is between 0.05 and 6.88. Three main principal axis strain strength ε1, ε2, ε3 are at the range of 0.13~1.35, -0.26~-0.28, -0.54~-0.18, respectively. Strain type from the edge to the core change from flat to coexist of flat and long to long. Strain Strain size from edge to core strain showed a trend of increasing and then decreasing. In other words, the strongest deformation developed in the middle part. Calculation of kinematic vorticity and estimation of temperature show that early Paleozoic gneissic granite underwent two stages structural deformation in Early Paleozoic at least. The early stage is pure shear deformation developed at 500~600℃ while late stage simple shear at 300~400℃.Combined chronological data, this article discusses the mechanism of ductile deformation of Early Paleozoic granite in Wugongshan area.