Abstract: The development of NCZ-1 dust-sticking agent was first intreduced in china. The speed of water absorption of dust-sticking agent was measured and studied on mining site and in laboratory, and then the law of water absorption of dust-sticking agent was analyzed. In addition, the mathematical model of the loss rate of dust-sticking agent was established by the application of fluid mechanics theory, and the method of determining the sprinkle parameters of dust-sticking agent was obtained. Through practical verification, it is found that the error of this mathematical model is less than 10%. So it can be used in the field.