The present invention relates to a composite warning device, comprising a main body； at least one pair of infrared contrast sensors electrically connected to the main body； and a warning component electrically connected with the main body； thereby, an infrared contrast sensor can be utilized Inducing moving objects (such as birds) in the cultivated land to transmit the sensing signals to the trigger controller and/or the microprocessor of the main body, thereby controlling the warning components disposed near the cultivated land to perform operations, such as alarms generating alarm sounds nearby Personnel, flashing warning lights emit strong lights or flickering birds, or firecracker sound generators produce firecrackers to scare birds, in order to achieve the effect of driving.本創作係一種複合式警示裝置，包括主機本體；至少一對紅外線對照式感應器，與主機本體電性連接；及警示組件，與主機本體電性連接；藉此，可利用紅外線對照式感應器感應耕地中的移動物體(如禽類)，以將感應訊號傳遞至主機本體的觸發控制器及/或微處理器，進而控制設置在耕地附近的警示組件進行作動，例如警報器產生警報聲通知附近人員，爆閃警示燈發出強烈燈光或以閃爍方式進行禽類的驅趕，或者是鞭炮聲音產生器產生鞭炮聲以驚嚇禽類，藉此以達到驅趕的功效。
