The anti-bunching properties of photons in the photon-added squeezed vacuum states were discussed in this paper.The results show that both Boson inverse operators and Boson operators acting on the usual squeezed vacuum states appear the anti-bunching effects. However,the effects due to the actions of Boson inverse operators are related to the squeeze parameter of the squeezed vacuum states and the number k of the added photons.Those due to the actions of Boson operators have the same squeeze parameter range but have no relatonship with the number k of the added photons.