The invention discloses a single station paste filling test-piece preparation device, aiming at achieving the manufacturing of a test-piece and a test-piece demolding function on a same machine through rotating each component, and solving the problems that when in traditional paste filling test-piece preparation, slurry leaks and the environment is polluted, and the preparation test-piece and demolding of the test-piece need different equipment, so that the stations are wasted and the efficiency is low; the high efficiency and high cleanliness are achieved; the paste filling test-piece preparation work of the station is saved; the single station paste filling test-piece preparation device comprises a bottom box, a hole plate, a small test-piece barrel, a large test-piece barrel, a demolding top plate, a knob, a screw, a connection rod and a multifunctional baffle; the device provided by the invention is convenient to operate, easy to maintain, and wide in application prospect of pastefilling test-piece preparation work.