The invention provides a method for making filter stick paper by using PLA fiber wet method, which includes the following steps: (1) beating the fiber raw material containing polylactic acid; (2) diluting the above mixed slurry, adding additives , to carry out online forming treatment; after that, the dry paper sheet is obtained through the wire section, press dehydration and drying treatment; (3) The dry paper sheet is coiled and slit in sequence to obtain the obtained product. The filter tip stick paper of the invention is easy to process and form, has uniform indexes, good quality stability and good cooling effect. Moreover, the fiber raw materials used in the method of the present invention are all degradable, environmentally friendly, and have a low glass transition temperature and good cooling effect; and the process is simple and easy, with low cost and high production efficiency, and can obtain excellent performance and excellent suction experience. The best filter stick paper.