Low-salinity pond jewfish offspring seed thickening method

The invention discloses a low-salinity pond jewfish fry thickening method which comprises the following steps: cleaning the bottom of a pond, removing sundries, removing water at the bottom of the pond, and then feeding water to a proper water depth; the water quality of the pond is subjected to early-stage regulation and control treatment before fry casting, after regulation and control, the pH value of the water body is 7.8-8.3, the ammonia nitrogen is 0, the nitrite content is smaller than or equal to 0.10, the dissolved oxygen at the water depth of 1 m is larger than or equal to 7.5, the salinity is smaller than or equal to 7 ppt, the water temperature is larger than or equal to 15 DEG C, the total alkalinity is 120-150 ppm, the hardness is 800-1000 ppm, and the transparency is 50-80 cm; after the fry are thrown, a splashing method is adopted for fish school health care in a feeding area, and a splashing formula comprises a formula 1 of 100 g of 98% feed grade Vc, 850 g of glucose and 50 g of 0.3% hyperic