The invention provides a filature auxiliary agent. The filature auxiliary agent is prepared from, by weight, 10-12 parts of a nonionic fabric softening agent, 3-4 parts of sodium borate, 7-10 parts of castor oil sodium sulfonate, 6-8 parts of castor oil acid imidazoline, 8-10 parts of perfluorinated sodium sulfonate, 3-5 parts of sodium carbonate, 9-11 parts of sodium silicate and 40-54 parts of water. Compared with the prior art, the filature auxiliary agent has advantages of formulation reasonability, effectiveness in improvement of cocoon reelability, improvement of product quality, thoroughness in cocoon infiltration, uniformity in reelability, softness and smoothness in handfeel, reduction of influences of cocoon quality differences on filature quality, whiteness, glossiness and smoothness of silks obtained by follow-up procedures and low production cost.