Blood collection device

The utility model belongs to the field of medical instruments, and particularly relates to a blood collecting device which comprises a workbench. A storage box is fixedly installed on one side of the top face of the workbench, a handle is manually rotated, then a bevel gear at one end of the handle is driven to start to rotate, and due to the fact that the bevel gear at one end of the handle is in meshed connection with a bevel gear on a threaded rod, when the handle is rotated, the bevel gear on the handle drives the bevel gear on the threaded rod to rotate; a movable column is in threaded connection with the threaded rod, so that the movable column is driven to ascend while the threaded rod rotates, a supporting block drives a mounting table to ascend, and the distance between a first clamping block and a second clamping block can be adjusted by arranging a lifting device; therefore, the device can be adjusted according to the sizes of wrists of different patients, the practicability of the device is furthe