The gearbox must have sufficient rigidity to withstand the force and torque generated by the wind turbine and the reaction force generated during gear transmission, to prevent deformation and ensure transmission quality. The design of the gearbox box should be carried out in accordance with the layout arrangement, processing and assembly conditions, and convenience for inspection and maintenance of the wind turbine power transmission. With the continuous and rapid development of the gearbox industry, more and more industries and different enterprises have applied gearboxes, and more and more enterprises are developing and growing in the gearbox industry.