The invention discloses a low grade highway curve blind area display and alarm device comprising a first geomagnetic sensor, a first outdoor infrared microwave detector, a first storage battery, a first supporting rod, a first ZigBee router, a first control circuit board, a first metal aluminum box, a first LED display screen, a first solar cell panel, a first ZigBee terminal node, a first LED display board, a second geomagnetic sensor, a second outdoor infrared microwave detector, a second storage battery, a second supporting rod, a second ZigBee router, a second control circuit board, a second metal aluminum box, a second LED display screen, a second solar cell panel, a second ZigBee terminal node and a second LED display board. The driver entering the curve entrance is enabled to know the road condition information of the entrance of the other side of the curve in advance, and the driver of one side entrance of the curve can also be notified of the information of the entered curve in advance so that the driver can be prompted to pay attention to driving safety when driving around the curve.