A deep loosen fertilizer spreader belongs to an implement of an agricultural machine for soil tillage, comprising a deep-loosening shovel assembly, a single-pipe double-vane fertilizer spreader, and a combined floating toothed harrow assembly which are arranged on the same machine frame according to the tilling sequences of general deep-loosening, general deep fertilizing, and crumbling. The deep-loosening shovel assembly is spaced with intervals which is four times bigger than the lateral distance between two fertilizer spreading openings of the single-pipe double-vane fertilizer spreader, and is staggered on the front cross beam and rear cross beam of the machine frame, which meets the needs of wheat planting for soil tillage. The utility model has the advantages of ordered soil layers, uniform fertilizer distribution, high-usage, combination processes of loosening and raking, labour saving, and energy conservation.