The invention discloses a high linearity degree triangle wave generating method which includes the following steps: a guide switch controlled by a drive element conducts a constant current source and a zero connection capacitance in sequence according to an inputted square wave; when the signal of the inputted square wave is high, then the constant current source charges the capacitance; whereas,then the constant current source discharges the capacitance; in the ordered charging/discharging process, the voltage at the charging end of the capacitance is increased/reduced; then a correspondingtriangle wave is combined and generated at the charging end of the capacitance. The high linearity degree triangle wave generating method is mainly characterized in that simulation followers are connected in parallel between the charging end of the capacitance and the discharging end of the constant current source, namely the two ends of the guide switch, for carrying out voltage following on thecapacitance for reducing the voltage jump when the guide switch is conducted. A circuit added in the invention is simple; and the voltage jump is effectively solved, thus greatly improving the linearity degree of a triangle wave generator.