The invention belongs to roadway tunneling equipment, and provides a supporting boot system of a small-section shield turning machine for coal mine. The supporting boot system comprises a front supporting boot assembly and a rear supporting boot assembly, wherein the front supporting boot assembly comprises a front saddle, pushing oil cylinders, front supporting boots, front supporting boot oil cylinders and a front telescopic beam; the front end of the front saddle is hinged with multiple pushing oil cylinders; the two sides of the front saddle are separately equipped with one front supporting boot; the front supporting boots are connected to the front saddle through the front supporting boot oil cylinders, and the length of the front telescopic beam is adjustable; the rear supporting boot assembly comprises a rear saddle, rear supporting boots, rear supporting boot oil cylinders and a rear telescopic arm, the front end of the rear saddle is hinged with the rear end of the front saddle; the two sides of the rear saddle are separately equipped with one rear supporting boot; the rear supporting boots are connected to the rear saddle through the rear supporting boot oil cylinders; and length of the rear telescopic arm is adjustable. The supporting boot system of the mall-section shield turning machine for the coal mine provided by the invention is simple and compact in structure,is suitable for tunneling a hard rock tunnel with a diameter smaller than 3 meters, and meets current quick tunneling needs of the coal enterprise.