The invention discloses a continuous measurement device of an exploitation well testing for oil, which comprises a control system, a separator, a flow meter, a valve and a pipeline, etc. A sand remover, a hand-operated valve, a temperature meter and a pressure gauge are arranged in sequence from a fluid inlet pipeline at the upper part of the separator to a well-mouth production pipeline; a vortex precession flow meter is arranged between the hand-operated valves on the oil-well gas measurement pipeline; the hand-operated valve, an automatic regulating valve and the vortex precession flow meter are arranged in sequence on a gas measurement pipeline at the top of the separator; the hand-operated valve, a mass flow meter and the automatic regulating valve are arranged in sequence on a fluid outlet pipeline at the lower end of the separator; the upper part of the separator is provided with a safety valve and a waste liquor recovering tank under the safety valve, a content gauge is arranged in the middle and a heater is arranged in the interior; the vortex precession flow meter is arranged between the hand-operated valves of a well-mouth bushing pipeline; the inlets of the hand-operated valves, the vortex precession flow meters and general valves are connected together. The measurement device of the invention has the advantages of high measurement accuracy and high automation degree, etc., and is widely applied to the continuous measurement process of the liquor drainage of the oil exploitation well.