Abstract: This experiment studied on the edible amaranth, the Malabar spinach vegetable executed the nitrogen level to conduct the research differently to the vegetables nitric acid salt content influence. It’s for executes the nitrogenous fertilizer, the reduced fertilizer pollution provides the rationale as well as the promoted special vegetables. Carries on the design through the experimental statistics method to test and to analyze .The result indicated that, the NO3- content increases in certain scope along with the N application increases, and the fertilizer surpasses, the output can drop, while the nitric acid salt content still had the rise. At the same time, the vegetables in the different developmental stage, the weather situation and the applying fertilizer time length, the NO3- content also can differ from.