Cutting speed reducer of coal mine development machine

The utility model relates to a cutting speed reducer of coal mine development machine, which comprises a box body, an input shaft, and a planet speed reducing assembly arranged in the box body and is linked with the input shaft. The cutting speed reducer is characterized in that the speed reducer box body is a round tube shape whose both ends are respectively provided with an input end flange and an output end flange and which is provided with a baffle plate. The cutting speed reducer simplifies the structure of the box body, can be formed through casting, improves the integral strength of the box body, prevents the problem of centralized welding line stress existing in a welding structure, realizes the optimum driving equal load, improves the driving efficiency, guarantees the processing and the mounting precision, and enables the inner structure of the whole speed reducer to be simple, practical and compact. A needle bearing is selected on a low speed stage planet wheel, which can satisfy the requirements o