The invention discloses an upper sample loading device, by which test samples can be loaded from the upper ends thereof. The upper sample loading device comprises a function shaft, more than three sample loading heads, and linking bridges the number of which is same as that of the sample loading heads), wherein one end of each linking bridge is connected with a lower end of each function shaft, and the other end of each linking bridge is connected with an upper end of each sample loading head, the sample loading heads and the linking bridges are arranged correspondingly; the function shaft and the sample loading heads are all cylinders; and the axis of each sample loading head and the axis of the function shaft are parallel to each other and arranged in a same plane. The invention has the advantages of simple structure, easy use, reliable performance, strong commonality, and the like, can widely be used in the upper loading of the test samples, and provides a useful solution for upgrading the loading modes of the test samples used in scientific research and experimental teaching, in particular to solve the problem existing in sample loading in special occasions by using the traditional 'suspension type' sample loading method, therefore, the invention is particularly suitable for the loading of the samples used in the dynamic test on biodegradability of medical magnesium alloy.