A crane without a cab does not need a driver's license. Crane is a special kind of equipment, which is usually produced and maintained by factories or enterprises, rather than operated by individuals or drivers. Therefore, a crane without a cab does not need a driver's license.

To sum up:

A crane without a cab is not a motor vehicle, so it doesn't need a driver's license. However, crane operators need to receive professional training and obtain corresponding qualification certificates to ensure safe operation.

Legal basis:

The Law of the People's Republic of China on Safety of Special Equipment stipulates that special equipment includes boilers, pressure vessels, pressure pipes, elevators, lifting machinery, passenger ropeways, large amusement facilities and special motor vehicles in the field (factory). Personnel operating special equipment need to receive professional training and obtain corresponding qualification certificates.