The invention discloses a modularized fast-assembly security inspection door, which comprises a security inspection door body, a security inspection table, a protection plate, a fixed support, a display, a laptop and a working table, wherein the security inspection door body comprises a scanning antenna, a linear guide rail, a motor, a driving shaft, an aluminum profile frame and a packaging plate; and each of the security inspection door body, the security inspection table and the working table is a module respectively and independently. During the disassembly and movement process, disassembly of the complicated structure inside the security inspection door can be avoided, the parts are simply linked via interfaces and screws, and assembly and disassembly are convenient. Defects that assembly and disassembly of the traditional security inspection door is complicated and long in time consuming can be overcome; a shoe sole, which is the security inspection blind angle, of the inspected person can be inspected; and as the front door and the rear door perform scanning at the same time, the average security inspection time can be effectively reduced, the security inspection door application place can be expanded outdoors, and requirements on assembly conditions by the security inspection door are reduced.