Abstract: In order to determine the optimal intermediate complete decarburizing annealing processes for common grain-oriented (CGO) silicon steel, five kinds of intermediate decarburizing annealing processes were conducted, the microstructure, texture and decarbonization after different decarburizing annealing processes were studied by scanning electron microscopy and electro back-scattered diffraction (EBSD) technology. The results show that the average grains sizes of primary recrystallization were about 19 μm after five kinds of decarburizing annealing processes treatment, and them hardly varied with annealing temperature and time. The grains size was most uniform after annealing at 840 ℃ for 10 min, the Goss texture orientation annealing was more accurate and the area frction of Goss texture was most, and up to 3.1%. The process of 840 ℃×10 min could decarbonize to 0.003 5wt%.