Two-gear gearbox of electric vehicle and control method of two-gear gearbox

The invention discloses a two-gear gearbox of an electric vehicle and a control method of the two-gear gearbox. The gearbox is provided with a first forward gear and a second forward gear, and the gearbox comprises an input shaft, an intermediate shaft, a first-gear unit, a second-gear unit, a main speed reduction unit and an output shaft, wherein when the input shaft rotates forwards, power is transmitted to the intermediate shaft through the first-gear unit and then transmitted to the output shaft through the main speed reduction unit, and a first forward gear is formed; and the input shaft rotates reversely, power is transmitted to the intermediate shaft through the second-gear unit and then transmitted to the output shaft through the main speed reduction unit, and a second forward gear is formed. Gear switching can be achieved only through motor steering speed regulation, power interruption is avoided, the control logic of a gear shifting mechanism and the whole vehicle is reduced, and the control mode is