The invention discloses a separate-orbit CubeSat launching device for carrying or launching a single or a plurality of standard CubeSat. The separate-orbit CubeSat launching device mainly comprises a rectangular framework, an unlocking mechanism and a spring mechanism, wherein the rectangular framework is mainly constructed by connecting a cabin door, a baffle plate, bottom plates, side plates, upper cover plates and a back cover plate in a threaded way; a separate guide rail is arranged as a satellite slide rail; a rotary electromagnet and the like are taken as the unlocking mechanism; the spring mechanism comprises a push plate and pressure springs. The separate-orbit CubeSat launching device has high generality, and is low in cost; the transportation safety and launching reliability of satellites can be ensured, displacement of the satellites during transportation can be prevented, and the cabin door is not collided with a running platform or reversed in an opening process; moreover, a push plate anti-separation measure and the like are adopted.