This experiment improves the traditional Chladni plate experiment．The improved device adds mobile phone bluetooth connection and uses phyphox software and piano software in smart phones as sound sources， replacing the sound source device in the laboratory and increasing the scope of inquiry．From the thickness， size，shape and other aspects of the aluminum plate to explore the factors affecting the formation of krani pattern．The improved Chladni plate experiment increases the interaction in the experiment，stimulates the students’desire to explore，and increases the students’understanding of the formation and propagation of one- dimensional and two-dimensional standing waves．