In this paper，the technical limitations of minimizing resource losing model and maximizing threat model are analyzed via reviewing
the current research of weapon target assignment ( WTA) problem． To solve the non － real － time problem with the existing
methods，a dynamic WTA method is proposed which accords with the practical combat． Firstly，to make the allocation model being real
－ time and general，the dynamic input of target is introduced at random． Secondly，aiming at the dynamic random system with target inputs，
the state of rebirth time is analyzed，and the system is transformed into a Markov process by embedded Markov Chain． Then the
system state transition probability is resolved． Thirdly，the objective function is constructed，and the target assignment dynamic model is
established by state transition matrix． Finally，the solution of model is given，and its validity and real － time characteristics are proved．
The method proposed in this paper refines and complements current weapon target assignment models．