The utility model provides a deep scarification and soil flouring combined land preparation machine and belongs to the technical field of agricultural machines. The deep scarification and soil flouring combined land preparation machine comprises a machine frame, a gearbox, two transmission boxes, a stubble cleaning device, a rotary tillage soil flouring device, subsoiling shovels, a ridging component and a suppressing component. The transmission boxes are arranged on the two sides of the machine frame respectively. The stubble cleaning device, the rotary tillage soil flouring device, the subsoiling shovels, the ridging component and the suppressing component are sequentially arranged on the machine frame from the advancing end of the land preparation machine. Side output shafts of the gearbox are connected with input shafts of the two transmission boxes through universal spindle couplings on the two sides respectively. A stubble cleaning shaft and a rotary tillage soil flouring shaft of the rotary tillage soil flouring device are connected with corresponding output shafts of the transmission boxes. The rotary tillage soil flouring device is formed by arranging rotary tillage blades and soil flouring blades on the rotary tillage soil flouring shaft in an alternating mode. The subsoiling shovels and the soil flouring blades correspond to each other in a one-to-one mode and are located on furrow positions. Through combined land preparation operation, stubble cleaning, rotary tillage, soil flouring, subsoiling, ridging and suppressing and the like are completed in a one-off mode, the thickness of a plough layer is guaranteed, the influence of a plow pan is broken through, the plowing and preparation time is shortened, and agricultural days are fully utilized.