The invention discloses a high-stability paper cone for loudspeakers, and relates to the technical field of loudspeaker production. The paper cone is composed of the following components by weight: 55-60 parts of polyester fibers, 10-25 parts of kapok fibers, 4-5 parts of pectin substance, 3-4 parts of styrene-butadiene latex, 5-6 parts of polyacrylamide, 4-6 parts of polyvinyl alcohol and 8-10 parts of polylactic acid. The high-stability paper cone has the beneficial effects of good water resistance, good damp resistance, good fatigue resistance, good elasticity and excellent structure strength. Thus, loudspeakers can keep fine fullness in the full band for a long time, the distortion of loudspeakers is greatly inhibited, and the sound quality of loudspeakers is improved.