Based on the monthly rainfall and runoff in Qinzhou during 1956-2016, double mass curve (DMC) model and evaporation difference method were applied to calculate the surface water resources. Besides, water loss method without the water of estuary tidal river and based on the improved minimum ecological water in the flood season and the direct method were applied to comprehensively analyze the available surface water resources. TTie results show that the amounts of surface water resources in Qinzhou are in the range of 106.573-111.216×108m3 and the available surface water resources is 38.444xl08m3, which accounts for 34.6% of the total surface water resources. Water resources is relatively plentifiil in Qinzhou, but the available surface water resources is less plentiful and the spatial -temporal distribution of it is uneven. From the spatial part, the available surface water resources are maximumin unbranched river zone while its are minimum in the Yujiang zone, and Nanliujiang zone is in the middle. In tenns of time, the water resources during flood season in 19 basins are as high as 81.949×108m3, involving the available amount of 62.272 xlO8m3 is difficult to control, and 35.823×lO8m3 is directly discharged into the sea through the unbranched river, and 4.973×lO8m3 is the salt water in the tidal reach that can not be used. TTie planning and construction of water diversion project play an active role in improving the river environment and relieving the contradiction between supply and demand.