Inner core for floor drain

The invention relates to an inner core for a floor drain. The inner core is provided with an inner core body, wherein a spiral buckle is arranged at the end opening of the inner core body; the inner core body is internally provided with a spring; the spring is provided with a three-beam lifting handle with a lug boss. The inner core for the floor drain has a simple structure, is convenient to use and meets ergonomics; the inner core has the advantages of good sealing performance, smooth water draining, good deodorization performance, no blocking, easiness of cleaning, backflow prevention and long service life; the cost is reduced and the working efficiency is improved.