The utility model relates to an instrumented impact sensor for a metal material and belongs to a sensor. The instrumented impact sensor comprises a double-elastic body as a main body, wherein the cross section of the double-elastic body is rectangular or square; a plug mounting hole is formed in the bottom of the double-elastic body; and a strain foil is adhesively bonded to the inner side and the outer side of the double-elastic body respectively. The circular arc radius of the head part of the sensor is L, wherein the length of L is from 2mm to 8mm. An angle Alpha is formed between both side surfaces of the head part of the sensor and is 30 DEG. The instrumented impact sensor is easily and repeatedly dissembled and debugged due to a novel and compact structure; the rapid response to the deformation of the elastic body is realized; the stressed deformation is uniform; signals are output stably and reliably; a great quantity of data such as the crack formation energy, the crack extension energy, the yield force, the maximum force and the like of a metal sample are analyzed and obtained by utilizing professional software; and the impact property of the metal sample is judged accurately; and the sensor is mounted and disassembled easily. Therefore, the instrumented impact sensor provided by the utility model is meaningful and has a practical value.