In order to improve the electro-osmotic effect in high water ratio soil dehydration consolidation, this paper introduced an electro-osmotic installation system for extensive soil draining which were composed by special power source, electrode, vacuum pump and flow measurement device etc. Among those above, the development of special power source was the core of the system, which was mainly introduced in this paper with power electrical technology and single chip SCM technology and constitutive digital high frequency switch mode power source. The system supported a plenty of technological operations. It was available in worksite.