The invention relates to a method for preparing paper through waste textile fibers. The method comprises the following steps of: taking the waste textile fibers and products as raw materials; sorting, opening, decontaminating, cleaning and accurate grinding the waste textile fibers; modifying the fibers; preparing sizes; forming paper sheets; hot pressing; and hot pressing and preparing the paper sheets at the temperature of 100-280 DEG C and the pressure of 0.2-1.2 KN/cm, wherein the basis weight is 13-48g/m<2>, the tightness is 0.31-0.78g/cm<3>, the evenness index is 62-78, the tensile index is 27-223Nm/g, the tear index is 7.6-26.2mN.m<2>/g, the burst index is 2.67-7.15kPa.m<2>/g, and a surface contact angle of static water is 20-90 degrees. Compared with traditional plant fiber papermaking, the performance is improved greatly. The method can be realized through equipment of textiles and paper, and the process flow is simple, the adaptability is strong. The method provides a recycling processing way for the waste textile fibers, and also provides new raw materials for pulping and papermaking.