Here, we present a new approach to simulate the molecular dissociation dynamics in strong IR laser field, which combines a quantum description of the dynamics of electronic states of a molecule and classical dynamics within a single electronic state. As an example, computer simulation results on HCl+dissociation in intense (I∼1014W/cm2) laser field in two‐level approximation are presented. The probabilities of different stable states of a molecule at the end of laser pulse are calculated. It is shown that molecule’s dissociation dynamics in intense laser field has a quantum stochastic nature. It is argued that the used model can be applied to multiatomic molecules as well. ©1996 American Institute of Physics.