In order to promote the method of vacuum preloading combined with electro-osmosis using electric vertical drain(EVDs)in large dredger fill foundation reinforcement, field tests on marine dredger fill in Wenzhou City reinforced by this method were conducted. Comparisons of this method with the method of vacuum preloading combined with electro-osmosis using metal electrodes and the conventional vacuum preloading method were performed. Changes in the vacuum pressure, surface settlement, current, and voltage were analyzed, and as was the growth rule of bearing capacity of the foundation after reinforcement. The test results show that EVDs can obtain the same reinforcement effect as metal electrodes, that their use is effective and feasible for electro-osmosis, and that their arrangement has an influence on the reinforcement effect. The surface settlement of the method of vacuum preloading combined with electro-osmosis using EVDs is over 9% larger than that of the conventional vacuum preloading method, and the bearing capacity of the foundation of the former is over 21.4% larger than that of the latter. The bearing capacity of the deep soil increases, and the reinforcement effect is significant.