A smart LED lighting device with light color automatically changeable comprises a LED lighting component, a driving motor, and a rotary light filtering member. By the invention, the requirements of a user for the richness and diversity of screen locked interface is satisfied, the availability and friendliness of the mobile terminal device in terms of the screen locked interface is improved and the user experience is improved. The titania extrudate has improved processibility andor mechanical properties. The annular body is rotatable about the dirt trap.