Drawing molybdenum tube core rod fixing device

The utility model provides a molybdenum tube drawing core rod fixing device. A positioning assembly, a clamping assembly and a driving assembly are arranged on a drawing machine, wherein a core rod penetrates through the positioning assembly, the clamping assembly has a first state and a second state, and the driving assembly drives the clamping assembly to be switched between the first state and the second state. The core rod is provided with a first end and a second end in the first direction, the clamping assembly is provided with a first clamping arm and a second clamping arm, and when the clamping assembly is in the second state, the first clamping arm and the second clamping arm clamp the first end; during use, traction force is applied to the second end, the first clamping arm and the second clamping arm apply clamping force towards the first end in the second direction to the first end, and friction force generated after the core rod is clamped is increased; compared with the prior art, after the trac