Steel rail glued joint shear testing machine and use method thereof

The invention discloses a steel rail glued joint shear testing machine and a use method thereof. The shear testing machine comprises an upper pressing surface and a lower pressing surface which are used for clamping a sample, as well as an upper pressing plate located between the upper pressing surface and the sample, a magnetic base is arranged on the side surface of the upper pressing plate, and a circular groove is formed in the lower surface of the upper pressing plate; the device is provided with a pressing cylinder which has different heights and can be replaced for use, the upper part of the pressing cylinder is provided with a sample bearing table, the lower part of the pressing cylinder is provided with a pressing cylinder external structure, the sample bearing table is provided with two sample bearing table bulges, a sample bearing table plane is arranged between the sample bearing table bulges, and a sample is placed on the sample bearing table plane; a cylindrical groove is formed in the upper sur