The invention discloses a suspension type cotton picking machine, which comprises a cotton picking head, a cotton conveying mechanism and a cotton storing box. The machine is characterized in that: the cotton picking head is provided with a suspension frame capable of being connected with the front of an engine; the power input end of the cotton picking head is provided with a hydraulic motor; the cotton storing box is provided with a traction frame connected with the rear part of the engine; and the cotton conveying mechanism is arranged between a material outlet of the cotton picking head and the cotton storing box. Compared with the prior art, the cotton picking machine adopts the hydraulic motor to drive the cotton picking head to greatly simplify a transmission mechanism of the cotton picking head and reduce weight, and adopts a front suspension way to connect with the prior engine to save power, so that the structure of the whole cotton picking mechanism is greatly simplified, the manufacturing cost, maintaining cost and using cost are greatly reduced, and the machine is very suitable for Chinese national conditions.