The invention discloses a hierarchical pore Hbeta molecular sieve catalyst for preparing diphenylamine by condensing aniline. The hierarchical pore Hbeta molecular sieve catalyst is prepared by virtue of a direct synthetic method or a micropore molecular sieve modification indirect synthetic method. The invention also discloses a preparation method of the hierarchical pore Hbeta molecular sieve catalyst as well as an application in preparing diphenylamine by catalyzing the condensation of the aniline. Under the effect of a formed catalyst prepared by the hierarchical pore Hbeta molecular sieve catalyst, the aniline has a self-condensation reaction to prepare diphenylamine, the reaction temperature is 290 to 370 DEG C, the reaction pressure is 1.5MPa to 5MPa, and the airspeed is 0.1 to 0.7/h. The molecular sieve catalyst has the advantages of good catalytic activity, good stability and high diphenylamine selectivity. Compared with the corresponding ordinary micropore Hbeta molecular sieve, the conversion rate of the aniline is at least increased by 23%, the selectivity of the diphenylamine is at least increased by 1%, and the service life of the catalyst can reach more than 7000 hours.