Organized semiflexible networks composed of a large number of cross-linked quasi-linear filaments, such as actin filament semiflexible networks which determines cell stiffness and transmits force during cellular shape changes. The mechanical property of semiflexible networks plays an essential role in numerous physiological processes, and is a major research topic in the domain of complex network dynamics as well. In this work, by using the ANSYS code, we studied the shear modulus of semiflexible networks with both fixed crosslinks and free crosslinks. The scale factor L/λ, where L is the length of filament and λ the non-affine length, is appropriate for characterizing the shear modulus. The ratio of the two cases was calculated and we found a minimal value at L/λ≈1.05.