  The azimuthal angular decorrelation that is relevant to small-x QCD physics
is studied in this paper to show the BFKL effect with a recent event generator.
Events are generated at \sqrt{s} = 100 TeV with proton-proton collisions and
jets, that are reconstructed by the Anti-k_{T} algorithm (R=0.7), with
p_{T}>35GeV and in the rapidity range of |y|<6 are selected for the study. The
azimuthal-angle difference between Mueller-Navelet Jets (\Delta\text{{\Phi}} )
in the rapidity seperation (\Delta y) up to 12 is analysed. The distributions
of <cosn(\pi-\Delta\Phi)> for n=1,2,3 and their ratio are also presented as a
function of \Delta y.
