A parallel MPS method which adopts a domain decomposition strategy based on a background grid strategy and combines a dynamic load balance method for numerical simulations of 3D liquid sloshing problem is presented in the paper. Inter-processor communication is implemented by use of MPI (Message Passing Interface) libraries. Analysis of parallel efficiency is carried out against liquid sloshing in 3D baffled tank by running with different number of processors, showing a satisfactory speed-up rate. Validation is performed by comparing the computed water height and impact pressure with the corresponding experimental data. The presented MPS for sloshing problems is proved to be reliable and efficient. In addition, the effects of baffle on the sloshing are analyzed. Sloshing cases in three tanks with different baffle heights are taken into account. The comparison of impact pressure and velocity field shows that the baffle height has significant effects on the sloshing flows. The impact pressure decreases with increasing of the baffle height.

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