Mining dump truck power shift gearbox

The invention discloses a mining dump truck power shift gearbox which mainly solves the problem that an existing gearbox has too many parts and is complex is transmission route. The mining dump truck power shift gearbox mainly comprises an input shaft, an output shaft and six intermediate shafts, wherein each intermediate shaft is provided with a clutch, and the input shaft, the output shaft and the six intermediate shafts are respectively provided with a gear. According to the transmission route of the shafts and from the perspective of an end face, the input shaft (24), the first intermediate shaft (25), the sixth intermediate shaft (22) and the third intermediate shaft (19) are arranged in a quadrilateral mode; the input shaft (24), the second intermediate shaft (18), the fifth intermediate shaft (21) and the third intermediate shaft (19) are also arranged in a quadrilateral mode; the output shaft (23), the fifth intermediate shaft (21), the third intermediate shaft (19) and the fourth intermediate shaft (