The invention relates to a preparation method for modularized float-assisting, bulletproof and puncture-proof clothes. The whole modularized float-assisting, bulletproof and puncture-proof clothes are prepared by three procedures of coat design, module design and component combination. The modularized float-assisting, bulletproof and puncture-proof clothes comprises a neck protective body, a coat and a jockstrap, wherein the neck protective body forms integrated combination of a shoulder protector and a neck protector; double interlayers are arranged in front and rear sheets of the coat; a float-assisting layer is placed in each inner interlayer; a bulletproof layer and a puncture-proof layer are placed in an outer interlayer; and the lower hem of the coat is connected with the sheet-like jockstrap. The product is a tactical multifunctional integrated high-performance individual soldier protective harness with good float-assisting life-saving effect, large protective area and complete bulletproof and puncture-proof functions and capable of adjusting modules conveniently and carry various individual soldier equipment articles. The modularized float-assisting, bulletproof and puncture-proof clothes can effectively realize bulletproof, puncture-proof and float-assisting functions and achieves an effective safety protection effect on personnel engaged in security work and military personnel. The modularized float-assisting, bulletproof and puncture-proof clothes is a individual soldier protective harness with complete functions and best performance.