The invention discloses a production device and process of an inner bobbin casting, which belongs to the technical field of bobbins. An inner bobbin casting production device includes a bobbin and a grinding mechanism. The bobbin includes a cylinder body and a center hole. , connection groove, card groove, positioning groove, the middle part of the cylinder is provided with a middle hole, the bottom of the middle hole is provided with a connection groove, both sides of the connection groove are provided with card grooves, and the outer wall of the bottom end of the cylinder is provided with two The grinding mechanism includes the base of the device, the middle rod, the sleeve rod, the support plate, the handle, the adjustment cylinder, the linkage block, the linkage rod, the slider, the slider, the connecting rod, the block, the positioning rod, the drive motor, the driving gear , Driven gears, support rods, bar magnets, grinding blocks, arc-shaped struts, etc. The bobbin can be easily fixed, the grinding mechanism can automatically polish the bobbin, the production efficiency of the bobbin is improved, the labor cost is saved, the operation is simple, the use is convenient, and it is suitable for popularization.