Deodorizing invisible drainage device for building

The utility model belongs to the technical field of water supply and drainage, and particularly relates to an odor-resistant invisible drainage device for a building. According to the utility model, waste water generated in a toilet is primarily filtered by the filter screen frame and discharged through the fitting groove in the middle of the fixed disc, then the waste water is discharged throughthe discharge pipe at the bottom end of the device body, and after use, the movable block can be pressed downwards, so that the waste water can be discharged. Then the filter screen frame is driven tomove downwards while the fitting frame is tightly clamped in the fitting groove, and then the sliding barrel is driven to move downwards towards the inner side of the mounting barrel, so that waste water at the bottom end in the device body is extruded out, the waste water is discharged through the discharge pipe, and then the sliding barrel rebounds under the action force of the first supportingspring; the filter screen