The invention discloses a multifunctional automobile safety hammer. The multifunctional automobile safety hammer comprises a hammer handle and a hammer head, wherein the hammer head is fixed on the upper portion of the hammer handle; a rope cutting groove is formed in the side wall of the hammer handle, and a cutting edge is embedded in the rope cutting groove, the two ends of the hammer head areprovided with a conical head sliding groove and a second hexagonal groove respectively, and the inner part of the conical head sliding groove is connected to a crushing conical head in a sliding mode.According to the multifunctional automobile safety hammer, the end part of the hammer handle is provided with the conical head sliding groove, then the inner part of the conical head sliding groove is connected to the crushing conical head through a spring in a sliding mode, and a second rotating seat at the bottom of the crushing conical head is connected to a first connecting rod through a rivet, and then the end part of the first connecting rod is rotationally connected to a second connecting rod through a rivet, and the end part of the second connecting rod is rotationally connected to afirst rotating seat at the bottom of a sliding block; and a pressing block is connected to the hammer handle in a sliding mode, the crushing conical head can be exposed out of the hammer head throughthe extrusion pressing block, so that the damage of the crushing conical head to goods is effectively prevented.