The utility model discloses a portable cereal storage insect pest detection device, which comprises a supporting pedestal and is characterized by further comprising, the last fixed surface that supports the base is connected with the detection device shell, and the top threaded connection of detection device shell has a cap, the interior roof fixedly connected with buffer sponge of cap, and buffering hole, cushion chamber, oil through, telescopic hole and vibration -isolating slot have been seted up respectively to the inner wall of detection device shell, and the bottom in buffering hole communicates with the interior roof of cushion chamber. This portable cereal storage insect pest detection device, the surface that has reached the detection device body cushions the absorbing effect, thebuffer board the inertia effort that the gravity of the detection device body produced during with the buffering drive down the ejector pin withstand under the ejector pin, thereby make the pressuredisk to exert pressure to hydraulic oil, and then hydraulic oil is exerted pressure to shock -absorbing rod, shock -absorbing rod is through retaining ring to the detection device body chucking of exerting pressure, thereby effectual the solution often appears colliding with when insect pest detection device carries and causes the problem of damage.