The mechanism of carboxymethyl starch sodium composite scale is that the sodium carboxymethyl starch solution becomes more viscous through the adhesion of sodium carboxymethyl starch in aqueous solution, thus playing the roles of adhesion, adhesion, thickening and lubrication. In the pharmaceutical process, carboxymethyl starch sodium composite tablets are often used as pharmaceutical excipients to make different dosage forms of preparations, such as tablets, capsules, powders and so on. In the food industry, it is also often used as thickener, stabilizer and emulsifier.