Improved French green sword bean canned food and preparation method

The invention discloses improved French green sword bean canned food and a processing and preparation method. The food comprises more than 55% of solid matters and 42-44% of spoon meat by mass percent; the pH value is 5.3+/-0.2, the content of NaCl is 0.8-1.2%, the content of protein is 4.0-6%, the content of saccharides is 2-4%, the content of salt is 0.8-1.2%, the content of citric acid is 0.01-0.015%, and the content of vitamin C, Ca, P, Fe, Na and other elements is 0.1-0.3%; the food is dark green or light green, the length of bean pod is 7-12cm, and the diameter of the bean pod is 5.0-7.2mm. The process of the invention has the advantages of scientific material, reasonable proportion, advanced process, simple method, low cost, rich nutrition, no fiber, delicate mouthfeel, typical taste and smell of French green sword bean and no peculiar odor, thereby meeting the minimum market access requirement of European and American food hygiene and safety standards on green sword bean canned food and being benefici