The invention discloses a floor mat cleaning device. The floor mat cleaning device comprises a conveying mechanism, an ultrasonic cleaning mechanism, a clean water cleaning mechanism, a vacuum water sucking mechanism, a drying mechanism and a winding mechanism, a conveying belt which is in rolling connection with a guide-in roller sequentially passes through the ultrasonic cleaning mechanism, theclean water cleaning mechanism, the vacuum water sucking mechanism and the drying mechanism and then is in rolling connection with a winding roller, and a circulation is formed. By setting the continuous operation steps, the whole process including feeding, cleaning, water absorbing, drying and winding can be achieved, and the working efficiency is obviously improved. The floor mat cleaning deviceis simple in structure, convenient to use, capable of saving energy, environmentally friendly, safe, long in service life, high in working efficiency and good in cleaning effect.