Gearbox for agricultural machinery

The invention relates to the technical field of agricultural machinery, in particular to a gearbox for the agricultural machinery. The gearbox comprises a gearbox body, a first driving gear is connected to an input shaft, a second driving gear is connected to the input shaft, a third driving gear is connected to the input shaft, a transmission assembly is connected in the gearbox body, and a second variable-speed shaft is connected in the gearbox body; and first speed changing teeth are connected to the second variable-speed shaft, fourth speed changing teeth are connected to the second variable-speed shaft, a third variable-speed shaft is connected into the gearbox body, and an output assembly is connected into the gearbox body. According to the gearbox, power input by the input shaft istransmitted to the second variable-speed shaft through the transmission assembly, speed changing is achieved through gear engagement of the first speed changing teeth and the third speed changing teeth, kinetic energy is then