Abstract:In order to study the evolution of cosmic void and the differences between galaxy void and dark matter void with a suite of high-resolution N-body simulations and mock galaxies produced by a semi-analytic model, we use the method of void finder without watershed transforming VIDE (Void Identification and Examination toolkit) and identify the voids in 6 snapshots from $z =$ 2.03 to 0. For each void sample, the statistical properties of void evolution from DM (dark matter) voids and galaxy voids are investigated, respectively. Compared the relative differences such as abundance, number, shape, effective radius, stacked density profile, the results show that the number of voids decreases gradually with redshift, the internal density of void becomes deeper, the volume increases, and the shape of voids tends to be more elliptical. The ratios of void statistical properties such as void number, mean effective radius, mean ellipticity of dark matter void to those of galaxy voids show a linear relation with redshift. Moreover, the density contrast of small voids tends to be lower than that of the large ones for both population of tracers, which makes small voids easily to merge and evolve more violently. Due to that galaxies always follow the high-density region of dark matter field, galaxies can not accurately trace the weak wall structures of dark matter voids which makes galaxy voids merge more easily than dark matter voids. For the galaxy voids, the surrounding dark matter density tends to be very high even at the weakest position at the ridge of void, which not only keeps the position of galaxy stable but also likely triggers the formation of new galaxies at late time, thus suppresses the merging of galaxy voids, and our results show that dark matter voids evolve more violently than galaxy voids.