CompHEP development for parallel calculation of particle processes at LHC

Computation of signal and background particle processes at LHC experiments requires a lot of CPU time. Thus the problem of using of PC clusters for such calculation is very important. There is natural splitting of a calculation process into several ones for proton colliders like LHC. On the partonic level the calculation may be done for each subprocesses separately. We present a development of CompHEP system which supports the utilization of a set of CPU by means of PBS batch system or submission of a jobs into GRID. The first results for both PBS and GRID tests are presented.