The present disclosure relates to an angstrom silver injection for a cancer inhibition, a preparation method and an application. A composition of the angstrom silver injection includes: angstrom-level elementary substance silver powder with a concentration between 0.005 g/L and 0.500 g/L； medicinal anhydrous fructose with a concentration between 0.5 g/L and 1.0 g/L； sterile distilled water with a concentration between 998.500 g/L and 999.495 g/L. Tumor cell membrane surface has higher negative charge, and the increase of the negative charge on the membrane surface relates to acid mucopolysaccharide, DNA, and side chain charge of protein, especially to the increase or exposure of sialic acid. Angstrom silver and silver ions have positive charge to combine with the protein and nucleic acid molecule with negative charge inside and outside cells for interfering with synthesis of the protein and replication and transcription of the DNA to destroy normal life activity of cancerous cells.
