Main transmission spindle carrier of roller mill locating and enclasping device

The invention discloses a driving device for rollers of rolling mills in metallurgical industry, and a positioning and hugging device which is in particular suitable to main driving connecting shafts of plate-strip rolling mills. Technical problems which will be solved by the invention are that the positioning and hugging device of the main driving connecting shafts is provided, wherein an upper sliding seat, a lower sliding seat, an upper hugging block and a lower hugging block can be highly adjusted by the positioning and hugging device and roll-exchanging requirements can be satisfied by the positioning and hugging device. The positioning and hugging device of the main driving connecting shafts of the rolling mills comprises a hugging device with a roll end catcher of the main driving connecting shafts of the rolling mills and a lifting device, wherein the hugging device with the roll end catcher comprises a hugging block, a sliding seat and a hugging hydraulic cylinder, wherein the upper sliding seat of t