The invention provides a tablet machine and a full-automatic slag producing machine and belongs to the field of steel mill slag detection. The tablet machine comprises a rack, a mounting portion, a steel ring and a machining device used for machining slag. The steel ring is mounted on the mounting portion. The steel ring is used for containing the slag. The mounting portion is movably connected with the rack. The machining device is mounted on the rack. The full-automatic slag producing machine comprises a frame body, a center manipulator, a detection device, a breaking and grinding functional module and the tablet machine. The center manipulator, the breaking and grinding functional module and the tablet machine are mounted on the frame body. The center manipulator is used for putting the steel ring into the detection device. The detection device is used for detecting whether the steel ring cracks or not. The breaking and grinding functional module is used for breaking the slag and conveying the broken slag into the tablet machine. By the adoption of the tablet machine, when tabletting is conducted, the mounting portion slides on the rack and carries the steel ring into the machining device, after machining is completed, the mounting portion with the steel ring leaves the machining device, and thus treatment efficiency is improved.