We have used the transverse correlated properties of the entangled photon pairs generated in the process of spontaneous parametric down-conversion, which is pumped by a femtosecond pulse laser, to perform Youngs interference experiment. Unlike the case of a continuous wave laser pump, a broadband pulse laser pump can submerge an interference patte. In order to obtain a high visibility interference patte, we used a lens with a tunable focal length and two interference filters to eliminate the effects of the broadband pump laser. It is proven that the process of two-photon direct interference is a post-selection process.