The invention provides an integrated method for oil testing and well completion. The integrated method includes the steps that when an oil testing test is performed, an integrated pipe column composedof an upper pipe column and a lower pipe column which are detachably connected is lowered to a downhole predetermined depth, a packer in the integrated pipe column is subjected to setting, the oil testing test is performed, after the oil testing test is completed, a plugging valve is activated to perform shut-in downhole, and the upper pipe column and the lower pipe column are separated and the upper pipe column is lifted out; and when well completion and production are performed, a completion pipe column with a downhole safety valve is lowered into the bottom of a well and connected with thelower pipe column in a back inserting and abutting mode, the plugging valve is opened by pressure from an annulus or an oil pipe to realize well completion, and well completion and production are performed. The integrated method has the beneficial effects that the method has the advantages of saving operation procedures, being high in efficiency of well testing transfer, reducing engineering complexity, protecting oil and gas layers, reducing well control risks, reducing costs and the like.