Аннотация:In holographic approach, the quark-gluon plasma formation in heavy-ions collisions (HIC) in 4D space-time is equivalent to black hole creation in 5D space-time and the multiplicity is estimated using the entropy of the produced black hole. The experimental data give a multiplicity estimation that does not correspond to a simple AdS5 holographic model. One way for modification is b-factor introduction to AdS5 metric. We consider the modified AdS5 space with the factor $b=(L/z)^a exp(-z^2/R^2)$ , estimate the entropy corresponding to wall-wall collisions and compare it with the recent experimental data of heavy-ions collisions at the LHC.