Because the existing method considers the loading control moment as a sum of the dead load on the bare beam before construction (mainly for bridge deck pavement) and the design vehicle load, the bearing capacity of the deck pavement is not considered, so the test result is not accurate.In this paper, a new method is proposed to determine the loading dominate moment of the bare beam static test.This method is based on the maximum strain with the combined effect of design vehicle loads and bridge deck pavement in the finished bridge state and the dominate moment is calculated reversely by the maximum strain through the second moment of area.This new approach has fully considered the construction and the process from the bare beam to the finished bridge state.The dead load of bridge deck pavement is borne entirely by the bare beam in the process of bridge construction, and a part of bridge deck pavement work with beam to form a stress whole to bear the design vehicle loads.The test results prove that the new method can achieve the precision of dominate moment and the refinement of test control in the bare beam static test.