The invention relates to a method for online removal of adhered tin from floating flat glass for electronic display. The method comprises the following steps: 1, arranging a high frequency induction heater after a tin bath forming process; 2, adjusting the frequency of the high frequency induction heater to make the high frequency induction heater heat metal tin; 3, oxidizing the metal tin into a stannous oxide gas or a tin oxide solid; and 4, blowing the stannous oxide gas or the tin oxide solid off the flat glass. The high frequency induction heater is arranged between the tin bath and cutting, the electromagnetic working frequency is adjusted to heat the metal tin without heating nonmetallic glass and oxidize the adhered tin into the stannous oxide gas in a lean and in an oxygen-lean state or oxidize the adhered tin into the tin oxide solid in an oxygen-rich state, so the metal tin disengages from the upper surface and the lower surface of a flat glass belt, and scratches to the surface of the glass are effectively prevented in the tin removal process.