A pre-warning monitoring device for engineering construction is disclosed, which includes a mobile mounting frame, gears, a gear plate, a dustproof box, a buzzer, a loudspeaker, and a stepping motor. The device is placed on the device by universal wheels, electric push rod and support base. When a slight impact occurs, the electric push rod is retracted so that it can slide through the universal wheels to avoid direct falling and damage. Through the moving mounting frame, gears, and gear plates, it is convenient to repair the internal electrical components and keep the pulling process stable and automatically limited. The dustproof box has a sealed space to isolate the external environment of various electrical appliances, which is beneficial to improve their service life in the field. Through the buzzer, loudspeaker, and lower box, the sound is concentrated on the loudspeaker part to improve the warning effect. The step motor can realize all-round warning when all-round monitoring is needed.