The temperature dependence of the magnetic susceptibility and the high-field magnetization up to 55T are measured for URu2Si2 under high pressures up to 1 GPa. Both T-chi max and T-N in the susceptibility increase with increasing pressure. The Value of the susceptibility below T-chi max decreases with increasing pressure. The three high-held metamagnetic transitions at H-c1 = 35.1T, H-c2 = 36.5 T and H-c3 = 39.6 T at ambient pressure, show different pressure-dependent behaviors. The metamagnetic transition at H-c1 broadens but survives and its transition field increases with increasing pressure. However, the transition at H-c2 is smeared out and disappears above 0.4 GPa. The transition at H-c3 broadens more clearly than the transition at H-c1. The fact that both T-chi max and the metamagnetic transition fields increase suggests that the interaction between the f-electrons and the conduction electrons is enhanced by pressure. (C) 2001 Elsevier Science B.V. All rights reserved.