The properties of the Impulse electroflotation equipment are introduced briefly ,and the factors that influence the treatment effect of Impulse electroflotation are analyzed. The mathematical model of the Impulse electroflotation reacting tank which determines the height, volume and treatment capability of Impulse electroflotation is provided on the base of the basic equations of electroflotation. A calculate software for the design of Impulse electroflotation reacting tank is developed and the source code is given.