The invention discloses a mini-tiller system, which has the advantage that a rotary tillage transmission device can be conveniently detached. A machine body comprises a main machine and a rear machine body, wherein the rear machine body is connected with the main machine. A tillage device is arranged on the rear machine body. The rear machine body comprises a rotary tillage rear machine body and a tillage rear machine body. An auxiliary gearbox is arranged on the rotary tillage rear machine body. A detachable main gearbox transmission shaft fixing device and a detachable auxiliary gearbox transmission shaft fixing device are arranged on the mini-tiller system. The detachable main gearbox transmission shaft fixing device and the detachable auxiliary gearbox transmission shaft fixing devicecan axially fix a main gearbox transmission shaft and an auxiliary gearbox transmission shaft with a main gearbox. The tillage rear machine body is detachably connected with a main machine frame. A second tillage piece hanging mechanism is arranged on an auxiliary machine frame. The main gearbox transmission shaft fixing device and the auxiliary gearbox transmission shaft fixing device can simultaneously and axially fix the main gearbox transmission shaft and the auxiliary gearbox transmission shaft with the main gearbox, or the tillage rear machine body is detachably connected with the main machine frame.