The utility model discloses a be used for monitoring dynamic survey device that lures of rice white backed planthopper adult population quantity, it contains and hangs fixed frame (2), and baffle (1) is installed at the top that should hang fixed frame (2), and its bottom is fixed with head rod (5), the bottom of head rod (5) is provided with rather than cup jointing and connect fixed movable connecting rod (7) through adjust knob (6), and the second connecting rod is extended downwards perpendicularly to the bottom of this movable connecting rod (7), the bottom of second connecting rod is provided with rather than cup jointing fixed fixed bolster (8). The utility model discloses simple structure, is suitable for that regional wide, operation is easily gone, the monitoring is efficient at with low costs, economical and practical, simple installation, and monitor effect is good, and the practicality is strong, has get effect instantly's monitoring and early warning's effect to rice white backed planthopper, and the non - lamp that is particularly suitable for the different zone lures district monitoring and early warning to use, has wide economic, society and ecological benefits.