The“direct vacuum preloading method for ground treatment” is developed on the base of the general vacuum preloading method. This method cancels horizontal drainage sand cushion and connects drainage board with sealed pipe network directly. The energy can be transmitted into the bottom of drainage board without decrement. The efficiency of vacuum energy is improved. This paper illustrates the soft ground reinforcement effect and the economic efficiency of direct vacuum preloading method for ground treatment with test results of five representative test areas in China. The test results show that the direct vacuum preloading method for ground treatment can reinforce different kinds of soft ground efficiently and economically.