The invention discloses a flow converging valve group, a power generating heating hydraulic flow converging control system and a spreading machine. The flow converging valve group comprises a work pressure feedback valve, a reversing valve, a first hydraulic one-way valve and a second hydraulic one-way valve, wherein control oil paths of the work pressure feedback valve, the first hydraulic one-way valve and the second hydraulic one-way valve are respectively connected with the reversing valve, and the control oil paths of the work pressure feedback valve and the first hydraulic one-way valve or the second hydraulic one-way valve are controlled to be communicated through the reversing valve. The flow converging valve group is arranged between a first hydraulic work system and a second hydraulic work system of the power generating heating hydraulic flow merging control system, so the hydraulic flow converging or the single work of the first and second hydraulic work systems is controlled, the structure is simple, the control is convenient, the low-speed economic gear power generating heating can be realized through a small-discharge-capacity pump, the cost generated through adopting the large-capacity pump is reduced, meanwhile, the oil consumption of an engine is reduced, and the energy saving is realized.