Soybean planting and weeding integrated device and method

The invention discloses a soybean planting and weeding integrated device which comprises a support structure and a control panel, a plurality of coulters are detachably arranged on the support structure, the support structure is further provided with a lifting driving assembly capable of independently driving the coulters to ascend and descend up and down, a soybean storage tank is arranged above each coulter, and the control panel is arranged on the support structure. A soybean discharging assembly capable of guiding soybeans out of the soybean storage tank at the coulter ploughing groove is arranged between the coulter and the soybean storage tank corresponding to the coulter; when the lifting driving assembly drives the corresponding coulters to lift up and down, the coulters, the lifting driving assembly, the soybean storage tank, the soil crushing and flattening structure, the soybean discharging assembly, the grass scraping assembly, the lifting driving assembly and the like cooperate with one another,