The invention provides a water returning preventing and deodorant floor drain device, and belongs to the technical field of sewer accessories. The water returning preventing and deodorant floor drain device is provided, an elastic hopper and a spring type bottom cover are combined with each other, sewage only can flow downwards and cannot overflow, a deodorant effect is good, and after one of parts is damaged, the floor drain device can still be used, and is convenient to repair. According to the technical scheme, a filtering cover is movably mounted at the upper end of a body, a convex ring is mounted in the middle in the body by matching an inner step and an outer step with the aid of self gravity, the elastic hopper which is made of silica gel sleeves the bottom of the convex ring, a water outlet in the lower portion of the elastic hopper is flat and is sealed in an elastic bonding mode to form a closed deodorant structure, a spring water draining device is mounted at an outlet in the lower end of the body, the upper end of the spring water draining device is a sewer pipe, a spring is mounted in the middle of the sewer pipe, the upper end of the spring is connected with the sewer pipe through an upper connecting plate, a water flowing gap is formed in the upper connecting plate, the lower end of the spring is fixedly connected with a bottom cap, and the bottom cap is matched with an outlet in the lower end of the sewer pipe.