The invention discloses a method for wrapping and rolling composite preparation of a stainless steel compound threaded rebar. The method comprises the following steps: raw material preparation, combination and forming of a covering material, an isolation layer and a core material, welding of a joint on the surface of the covering material, welding sealing of the end part of a compound steel blank, and heating and rolling of the compound steel blank: cleaning the surface of a raw material, forming the stainless steel covering material, pressing the carbon-steel core material and the nickel or nickel alloy isolation layer into the stainless steel covering layer to enable the covering material to be deformed and cover the core material, then welding the joint and the end part, and performing heating and rolling in sequence to obtain the compound threaded rebar. According to the technological method disclosed by the invention, the compound threaded rebar with a metallurgically bonded interface can be efficiently prepared at low cost. The compound threaded rebar prepared by the method has the characteristics of simple process, high production efficiency, high yield, low production cost, high interface bonding quality and the like.