Based on the section of the junction of two metal fibers which is different oval-oval geometry structure in different direction, the oval-oval model for the sintering crunode of two metal fibers is established by surface diffusion in every section. The model is numerically solved by using level set method to achieve the numerical simulation of the growth process of the sintering crunode in different sections. The three dimensional numerical simulation of the growth process of the sintering crunode is achieved by reconstituting the numerical simulation results in these sections. For two metal fibers with the fiber angle 60? the three-dimensional numerical simulation of the growth process of the sintering crunode is implemented, and the growth rates of sintering neck are discussed in different sections. The numerical simulation results show that the closer to the bisector of acute angle the direction is, the faster the growth rate of sintering neck is. The initial local geometrical structure in each section plays a key role in the sintering neck formation.