The invention relates to a connected centrifugal tube group, which comprises a plurality of centrifugal tubes in grouped connected arrangement, wherein the centrifugal tube comprises a tube body, an inner cover, an outer cover and a telescopic connecting device; the inner cover and the tube body are fixedly connected; the tube body can be sealed; the outer cover is arranged on the outer layer of the inner cover arranged at the upper part of the tube body in a sleeving way; the telescopic connecting device is fixedly arranged on the tube body; the plurality of centrifugal tubes are connected through the telescopic connecting device; the distance between the centrifugal tubes can be regulated. The plurality of centrifugal tubes can be connected in a grouped and connected way through the telescopic connection device; in the use process, the use is convenient; the space is saved; the serial number and the arrangement among the centrifugal tubes are clear, simple and compact; the problems of easy loss, wrong arrangement and the like in the use process of a great number of centrifugal tubes can be effectively solved; meanwhile, the telescopic connecting device enables the centrifugal tubes to be flexible and free both in a state of being arranged on a centrifugal tube plate or in the centrifugal machine operation process; the influence by tube hole distance cannot be easily caused.