The invention provides a flocculant dispenser of a washing machine. The flocculant dispenser of the washing machine comprises a material box, a flocculant conveying device and prestorage box, wherein the flocculant conveying device comprises a screw barrel, a conveying screw, a stirring gear and a motor; the lower end of the material box is communicated with the screw barrel; the conveying screw is arranged inside the screw barrel, one end of the conveying screw is connected with a motor, and the port of screw barrel, which corresponds to the other end of the conveying screw, is communicated with the prestorage box; the lower end of the prestorage box is provided with an openable blanking port; the stirring gear is arranged inside the material box and engaged with the conveying screw. According to the flocculant dispenser of the washing machine, the motor drives the conveying screw to rotate, and the conveying screw drives the stirring gear to rotate and further to stir flocculant; after the flocculant falls into the screw barrel from the material box, the conveying screw conveys the flocculant out and stores the flocculant inside the prestorage box; when the flocculant inside the prestorage box meets dispensing demands, the bottom end of the prestorage box can be opened to complete dispensing in one step. The flocculant dispenser of the washing machine can achieve automatic and quantitative dispensing of the flocculant, shorten the dispensing time and reduce moisture absorption of the flocculant.