Single inputting and double outputting planetary speed reducer

The invention mainly includes a box, two end caps, an input gear shaft, 2-4 driven gears, an offset crankshaft, an annular gear with internal teeth, 1-4 balance wheels, a support, a bearing disc an output central gear, high-speed and low-speed output shafts. The invention has realized input using one input gear shaft only and output of the power of different speeds using two output shafts.