The invention discloses a two-section type flotation machine which comprises a first-section flotation tank, a second-section flotation tank and a foam collecting tank. The first-section flotation tank and the second-section flotation tank are arranged side by side and connected together. The upper end of the first-section flotation tank and the upper end of the second-section flotation tank are both located in the foam collecting tank. A foam outlet is formed in the foam collecting tank. The first-section flotation tank is provided with a stirring shaft and a stirring drive mechanism. An impeller is mounted at the lower end of the stirring shaft. A support is fixed in the second-section flotation tank and provided with an inverted conical groove. The first-section flotation tank and the second-section flotation tank are connected through a pipeline conveying mechanism. The feeding end of the pipeline conveying mechanism is connected with a first-section tailings outlet in the bottom of the first-section flotation tank, and the discharging end of the pipeline conveying mechanism is provided with a feeding distributor. A second-section tailings outlet is formed in the bottom of the second-section flotation tank. The two-section type flotation machine is compact in structure, reasonable in design, simple in operation, small in equipment investment, good in flotation effect, high in flotation efficiency, high in adaptability to minerals, high in processing capacity, small in operation energy consumption and low in operation cost.