The invention discloses a concentrated natural centrifuged latex preserved without ammonia. According to the invention, a natural latex anti-coagulation preservative is added into the latex, the natural latex anti-coagulation preservative is an ammonia-free preservative and comprises raw materials consisting of potassium sulfate, sodium tripolyphosphate, sodium carbonate, sodium silicate pentahydrate, citric acid and sodium benzoate; butyl p-hydroxybenzoate is not used in the natural latex anti-coagulation preservative, and sodium tripolyphosphate is used instead, so the flora inhibition effect of the natural latex anti-coagulation preservative is maintained, and the problem that the latex is easy to cake after being stored for a long time due to poor water solubility of butyl p-hydroxybenzoate is solved; moreover, sodium hydrogen sulfite is replaced with potassium sulfate, good water solubility is achieved, the antibacterial range of the anti-coagulation preservative can be widened, and meanwhile, the problem that the preservative is heavy in smell due to addition of sodium hydrogen sulfite is solved; and raw material cost is reduced by reducing the use amount of sodium carbonate.The preservative has the advantages of low cost, no toxicity and no pollution, and can effectively enhance latex quality.