The invention belongs to the technical field of storage, regeneration and repair of cells and discloses low-temperature storage liquid for cells. The low-temperature storage liquid is mainly preparedfrom the following components in percent by mass: 0.8%-1.5% of mannitol, 2%-3% of human serum albumin, 3%-7% of low-molecular dextran, 0.1-0.3% of glutathione, 0.5%-2% of epigallocatechin gallate, 3%-5% of adenosine, 0.5%-1% of glucose, 0.8% of NaCl, 0.2% of KCl, 0.1% of CaCl2 and the balance of water. The invention also provides sodium alginate gel, which contains sodium alginate, calcium chloride, hyaluronic acid and the low-temperature storage liquid for the cells and the like, and also provides cell gel and a preparation method thereof as well as application of the low-temperature storageliquid for the cells, the sodium alginate gel and the cell gel. The invention has the advantages that the low-temperature storage liquid for the cells can maintain cell activity for longer time at temperature of 2-8 DEG C, the sodium alginate gel can be used as temporary short-term storage materials of cells from various sources and brackets of cell tissue engineering, and the cell gel can be usedas a medical wet wound dressing and can be used for repairing soft tissues, refractory-healing wound skins and mucosal wound injuries.