The invention belongs to the technical field of physical experimental equipment and especially relates to a measuring device for a drag coefficient of non-spherical particles on the basis of taking wall effect into account and a method. The measuring device comprises a conical base, a sudden-expansion cylinder drum, a liquid feed system and an electrolytic tank system; the upper end of the conicalbase is opening while the lower end is closed by a lower end socket; a plurality of grooves with different diameters are formed on an inner wall of the conical base; the sudden-expansion cylinder drum comprises a cylinder drum and a cylinder expander; the cylinder drum has a cylindrical structure and is embedded into a groove; the diameter of upper end opening of the cylinder expander is more than the diameter of lower end opening; the lower end opening of the cylinder expander is fixedly connected with the upper end opening of the cylinder drum; the liquid feed system is used for supplying the gas-liquid two-phase flow into the conical base and the sudden-expansion cylinder drum through the electrolytic tank system. The measuring device can be used for measuring drag forces endured by bulk solids, which are widely applied to the fields of energy, chemical industry, metallurgy, architecture and the like, in liquid and deducing the corresponding drag coefficient.