Based on the consolidation mechanism of the combined electroosmosis-vacuum preloading method, a field test was conducted on the hydraulically filled soft foundation treatment project in the Liangzi Lake Aquatic Ecological Exhibition Hall on Li Island, in Hubei Province. The performance of electric vertical drains(EVD)and the consolidation effect of electroosmosis were evaluated. The field test results show that the physico-mechanical properties and bearing capacity of the foundation soil are improved significantly after a 28-day treatment. The electroosmosis-vacuum preloading method using EVD can not only reduce the construction time and energy consumption, but also achieve the ideal consolidation effect.