The invention discloses a detachable strain preservation tube. The detachable strain preservation tube comprises a plurality of test tube bodies, wherein the top of each test tube body is connected with a test tube cover, the test tube body is sleeved with an annular plate, the inner wall of an opening on the top of the test tube body is provided with a slow flow ring, an anti-splash ring is nested in the slow flow ring, a sealing plug is arranged in the test tube cover, a liquid absorption tube is connected into the test tube cover, the upper end of the liquid absorption tube is connected with a rubber absorption ball, the bottom of the test tube body is provided with a stable platform, a groove is formed in the stable platform, the test tube body is arranged in the groove, and the bottom of the test tube body is connected with the groove by virtue of a plurality of springs. The preservation tube can automatically and stably erect when the strain solution is loaded or fetched, so that the operation is more convenient; and meanwhile, the plurality of test tubes are assembled and disassembled, so that the plurality of test tubes can be assembled together to be operated, the stability is improved, no extra sucker is needed for transferring the liquid, and the liquid transfer can be realized directly by virtue of the liquid absorption tube on the test tube cover.