The invention belongs to an automatic material conveying device, and specifically relates to a rotary platform for material conveying. The rotary platform for material conveying comprises a material disc support, a material disc, a rotary cylinder, a first clamping cylinder and a second clamping cylinder, wherein the rotary cylinder is fixedly connected to a support top plate of the material disc support through an installation plate of the rotary cylinder; the output end of the rotary cylinder is rotationally connected with a bearing seat through a crossed roller bearing; the bearing seat is fixedly connected with the material disc through an installation hole of the bearing seat; and the rotary cylinder drives the material disc to rotate during working. Material conveying is realized by virtue of a pneumatic system; the material disc is directly driven to rotate by the rotary cylinder; position locking is realized through the clamping cylinders; the running is flexible, convenient and reliable; the working efficiency is greatly increased; and the accidental injury of large industrial equipment such as a manipulator to working personnel under a hazardous environment is reduced.