Scale and corrosion inhibitor and preparation method thereof

The invention relates to a scale and corrosion inhibition method. The scale and corrosion inhibition method comprises the steps that at least one component of a scale and corrosion inhibitor is infused in an oil-gas well in a time-division asynchronous mode through a scale and corrosion inhibitor device at least comprising an input unit, an injection unit and a control unit, wherein the input unit infuses the at least one component of the scale and corrosion inhibitor into the injection unit in a pressurizing mode through at least one infusion pipeline connected with the injection unit; the control unit determines the jet rate proportions of the at least one component according to the mass proportions of the at least one component material of the scale and corrosion inhibitor, the concentrations and/or viscosity of the components and generates control information related to time; the injection unit coupled with an wellhead comprises a main hole channel, a conic separation pipe used for dispersing polymers and