Economize at ion of power is a gr eat roblem in national economy, it isalso a serious challenge in modern science and techno logy . In th broad sense economize ation of pow er co vers power saving technolo gy as w el l. Hydraulic pressur e technolo gy has found a w ide use in pow er saving technic. T his paper deals w ith this pro blem and carr ies on analysis and computat ion, combined w ith the application in a vehicle design. The result show s that the pow er saving ef feciency is about 50 percent . T his paper is valuabe for both researchers and designer s in the f ield of pow er economizat ion.