The invention discloses an abrasion resistance testing machine for a rock. The abrasion resistance testing machine for the rock comprises a fixed frame, a lifting mechanism, a test pin and a drive mechanism, wherein a rack is arranged on the fixed frame and is used for placing a to-be-tested rock sample of which the upper surface is ground into a plane; the lifting mechanism is used for driving the rack to move up and down relative to the fixed frame; the test pin can draw a scratch on the upper surface of the to-be-tested rock sample and is located at the upper part of the rack and a pin headis toward the rack; the test pin can generate relative movement relative to the rack in the front-rear direction; and the drive mechanism drives the test pin to move up and down relative to the fixedframe, thereby ensuring that the test pin leaves the scratch on the to-be-tested rock sample at predetermined pressure. According to the abrasion resistance testing machine for the rock, after the to-be-tested rock sample is put on the rack, the rack moves upwards under the action of the lifting mechanism and is matched with the drive mechanism capable of driving the test pin to move up and down,so that the test pin can be always kept in a predetermined pressure state to ensure the measurement accuracy; and furthermore, human operation is not needed in the movement processes of the rack andthe test pin, so that the automation degree is high.