A shearing force test device comprises a substrate mounted with an elastomer having a free end capable of moving toward or away from the substrate; the free end is connected with a test head; the elastomer is installed with two U-shaped elastic arms arranged at a distance and capable of mutually neutralizing horizontal position offsets; the free ends of the two U-shaped elastic arms are connected together; the test head is fixedly installed on the free end; the two U-shaped elastic arms are provided with the fixed end of the elastomer there between; the fixed ends of the two U-shaped elastic arms are connected together, and are fixedly connected with the substrate; and the other ends of the two U-shaped elastic arms away from the free ends are fixedly connected together via a connecting plate.