Multi-connection milling machine cutter mounting and fixing device

The invention discloses a multi-connection milling machine cutter mounting and fixing device which comprises a connecting interface, a fixed shell, a rotating device and a fixed clamping block. The connecting interface is connected with a milling machine; the fixed shell is fixedly connected with the connecting interface; the rotating device is arranged in the fixed shell and is in sliding connection with the inner wall of the fixed shell; the multiple fixed clamping blocks are annularly distributed, arranged in the fixed shell and connected with the rotating device. Compared with the prior art, through the arrangement of the rotating device, the fixed clamping blocks are moved, the milling cutter is fixed through the fixed clamping blocks, the multiple fixed clamping blocks clamp the milling cutter with the handle towards the middle to fix the milling cutter with the handle, the multiple fixed clamping blocks expand outwards to fix the milling cutter with the hole, and under the action of the locking ring, t