In this paper, the electron motion in a submillimeter level microhollow cathode discharge(MHCD) is investigated under high pressures by Monte Carlo simulation. Some swarm parameters have been obtained such as the electron density distribu tion in the field direction for a steady state, the energy and spatial distribut ion under different pressures.The result shows that MHCD under high pressures c an reflect in more detail the essence of the 'oscillating' effect of the hollow cathode discharge.When electrons oscillate in MHC,most of them are scattered st ill forward.With increasing pressure,the effect of lateral scattering will exhib it gradually.