Method for preparing fish scale gelatin plasma substitute injection

The invention relates to a method for preparing a fish scale gelatin plasma substitute injection. The method for preparing the fish scale gelatin plasma substitute injection includes the steps that fish scale gelatin serves as a raw material, and the plasma substitute injection is obtained through the production processes of gelatin degradation, cross-linking modification, electrolyte adding, adsorption, filtering, filling, sterilization, lamp inspection, packaging and the like. The method has the advantages that the plasma substitute injection is prepared from the fish scale gelatin, the low cost of the raw material is guaranteed, potential safety risks, caused when a gelatin raw material from animals such as pigs and cows possibly carries epidemic diseases such as a foot-and-mouth disease and a mad cow disease, of the human body are avoided, and a fish scale gelatin plasma substitute has higher biosecurity; succinic anhydride is used as a cross-linking agent, and therefore the toxic and side effects on the