The invention discloses a wet fermentation pickled Chinese cabbage seasoning packet capable of being preserved at room temperature for instant noodles and a production method thereof. The fermentation pickled Chinese cabbage is taken as a main raw material, the mixing uniformity is enhanced in a vacuum mixing manner, the possibility of oxidation and brown stain after contact of pickled Chinese cabbage and oxygen is reduced, the pH value achieves a low-acid value by adjusting an acidity regulator, sterilization is carried out by adopting a low-density heat sterilization process, and the pickled Chinese cabbage seasoning packet is free of a corrosion remover, is crisp and tender, sour and cool, and can be preserved at room temperature. In addition, the acid value and the water activity control are changed by adopting a segmented temperature control heating technology and an acid adjusting technology, the shelf life and the safety of the product can be effectively controlled, so as to obtain the wet fermentation pickled Chinese cabbage seasoning packet for instant noodles, which is strong in flavor and can be preserved at room temperature, and the shelf life can be up to over 10 months. The seasoning packet produced by the method disclosed by the invention is crisp and fresh, strong in sour fragrance, good in mouthfeel, stable in quality, and convenient to eat.