We present a scheme for achieving the clone of dark solitons in a nonresonant, incoherently pumped exciton-polariton condensate. By employing a composite pumping technique that combines homogeneous pumping and multiple Gaussian pumpings, and initially injecting a single dark soliton into one Gaussian pumping field, soliton cloning of high fidelity can be realized within the other Gaussian pumping fields due to the gain and loss mechanism. The "periodical copying"can be achieved for dark solitons, where we find the cloned breathing dark soliton groups. The cloning time of solitons can be manipulated by adjusting the pumping and system parameters. Furthermore, by controlling Gaussian pumping, the breathing dark soliton group can be transformed into a single dark soliton, which can be used to stabilize the dark soliton. In addition, in the case of the isometric arrangement of multiple Gaussian pumpings, the cloned breathing dark solitons occur at the outermost area. Our proposal offers a promising avenue for generating and controlling soliton cloning, discovering an alternate approach to find dynamically stable solutions in nonequilibrium systems. The soliton cloning also has potential applications including the synthesis of molecules and multisoliton clusters, and quantum communication technologies. © 2024 American Physical Society.