A device for detecting toxicity of a wild plant and providing an alert, the device comprising an upper cover (1), a cylindrical body (2), and a motor (9). A cavity of the cylindrical body (2) is provided with a rotating blade device (20) comprising multiple blades (201) and drivers (202). The motor (9) is connected to the drivers (202) via conductive wires. The motor (9) is used to drive the blades (201) to rotate and shred a wild plant in the cylindrical body (2) to form a plant liquid. Multiple fixing portions (6) are provided on a side wall of the cylindrical body (2). Each of the agent cylinders (6) is connected to a glass cylinder (8) via a communication tube (7). The cylindrical body (2) is provided with multiple holes (21) at a bottom portion thereof, each of the holes (21) corresponding to one glass cylinder (8). The plant liquid in the cylindrical body (2) passes through the holes (21) to flow into the corresponding glass cylinders (8). Each of the glass cylinders (8) is provided with a microbial sen
