Abstract: Based on Newton movement law and hydraulics theories, a new theoretical formula of sprinkler range was deduced on the assumption of considering atmosphere resistance without wind. And the experiment for sprinkler range influence factors was conducted in the laboratory. The results show that the new formula was in good agreement with the data of different types of sprinklers comparing with other empirical formulas, and the relative error is only 5.05%. The theoretical formula has distinct physical meaning and high precision. It is applicable to all kinds of sprinklers and micro-sprinklers.