The invention discloses an apparatus for making a pre-cracked sample for material mechanical properties test. The apparatus comprises a pedestal, a base plate is arranged at upper end of the pedestal, a model loop, a pre-cracked model, a positioning column and a positioning lock are arranged on the base plate, the pre-cracked model is fixed in the model loop in a movable mode, and the positioning column and the positioning lock are closely arranged at circumference of the model loop. The apparatus has the advantages of simple structure, less volume, and convenient operation; complexity of the experiment apparatus is reduced, production material is saved, making flow is indirectly simplified, and cost is saved. The used pre-cracked model substitutes a conventional cutter for cutting, pre-cracks quality can be increased, and abrasion of the used conventional cutter due to cutting on the sample and a cutter can be avoided.