The invention belongs to the field of structural engineering in civil engineering, and particularly relates to a pluggable longitudinal rib type sound insulation steel-concrete composite shear wall and an assembling method thereof. The pluggable longitudinal rib type sound insulation steel-concrete composite shear wall is characterized in involving an H-shaped steel body structure, rib plates and reinforcing meshes, wherein the H-shaped steel body structure comprises a web and two flanges symmetrically arranged on the two sides of the web, a plurality of rows of rib plates are arranged on the web plate from top to bottom, the rib plates are perpendicularly clamped on the web plate, reinforcing meshes are correspondingly arranged on two sides of the web, and the reinforcing meshes are hung on the rib plates. According to the pluggable longitudinal rib type sound insulation steel-concrete composite shear wall and the assembly method thereof, the rib plates are arranged on the web, the stability of the shear wall is improved, notches are formed in the rib plates, welding of steel bars in actual engineering is reduced, the structural integrity and the assembling efficiency are guaranteed on the basis of facilitating construction, meanwhile arranged materials can fully achieve the sound insulation effect, by means of the design of connecting joints and clamping grooves, connection among the structures is convenient and rapid, fastening is reliable, and the workload of on-site molding, installing and welding is reduced.