Multifunctional water seal floor drain

The invention relates to the field of floor drains, particularly to a multifunctional water seal floor drain. The multifunctional water seal floor drain comprises a floor drain pipe, a floor drain base and a floor drain cover, wherein the floor drain pipe is embedded underground, the floor drain base is arranged inside the upper end of the floor drain pipe, the upper portion of the floor drain base is open and matched with the floor drain cover, the floor drain cover is level to the ground, the floor drain base is integrally in a funnel shape, the bottom of the floor drain base is provided with a floor drain tube which is in a vertically open tubular structure, the bottom of the floor drain tube is provided with a semi-arc water seal plate which is elastically connected with the outer wallof the floor drain base through a spring, the inside of the floor drain tube is provided with a filtering tube, and the upper portion of the filtering tube is open and connected with the lower funnelopening of the floor drai