The invention relates to a brittle material sample die and a matched tension test fixture and includes a die and a fixture. A conveyer chain is arranged between the die and the fixture. The die includes a side surface plate, an end surface plate and a bottom plate. The side surface plate and the end surface plate are connected by a connecting element. The bottom plate is provided with a waterproof groove. The side surface plate and the end surface plate are connected with the bottom plate through the waterproof groove. The fixture includes a collet which is provided with a collecting spherical hinge. The collet consists of two parts and the two parts are connected through a connecting element. When the die is mounted, after each part is connected, a brittle material can be poured in the die to manufacture a bone-shaped sample. The enlarging end and the uniform section of the bone-shaped sample are transferred by a smooth curved surface. When the sample is stretched, a collet bolt is screwed out firstly and the bolt is screwed tightly after the sample is arranged in the collet. A tension test can be carried through after the connecting spherical hinge and the tension collet of a tension tester are connected. The invention has the advantages of simple structure, convenient dismounting, low cost, good manufacture effect, large holding area and excellent cooperation with the sample shape, etc.