The invention provides a white sour soup of wax gourds. The white sour soup is made of wax gourds, glutinous rice flour, lactose, salt, lactobacillus plantarum, lactobacillus acidophilus, xanthan gumand water. The making method comprises the steps that peel of wax gourds is removed, seeds of the wax gourds are removed, the wax gourds are cleaned, cut, smashed and mixed with water, the glutinous rice flour, lactose, salt, lactobacillus plantarum and lactobacillus acidophilus are added, mixing and stirring are conducted, after sealing anaerobic fermentation, the mixture is ground into slurry, and through pasteurization, the white sour soup of the wax gourds is obtained. The mass fraction of the wax gourds in the white sour soup is large, and the nutrients of the white sour soup are enriched; through lactobacillus plantarum and lactobacillus acidophilus, the fermentation process can be accelerated; through lactose, the sour is soft, partial lactose is fermented into lactic acid, corrosion prevention and fresh preservation can be achieved, the white luster of the white sour soup is maintained, and bacterium generation is inhibited; through xanthan gum, the stability is improved, the thickness of the white sour soup of the wax gourds is moderate, and layering is not generated. The made white sour soup of the wax gourds is fine in texture and smooth in taste, and through pasteurization, the soap has a large number of beneficial bacteria and is beneficial to the safety of the human body after being eaten.