Abstract: In order to make conventional implicit algorithm to be applicable in large scale parallel computers,an interface correction method is introduced to solve the particle transport S_N equations.Domain decomposition is adopted in the computational domain.On the interface,an upwind explicit scheme is applied to give an incident boundary condition,which enables the subdomain problem iterated independently.The interface values are updated by an implicit scheme concurrently in iteration.The scheme shows good precision,parallelism and simplicity in numerical experiments.

Key words: particle transport equation, parallel difference scheme, iteration method, interface correction