The present invention discloses a manufacturing method of composite wall brick, which includes: preparing a first wall brick main body, preparing a second wall brick main body, preparing a carrier main body, bonding the carrier main body and the first wall brick main body and bonding the first wall brick main body and the second wall brick main body wherein the carrier main body is formed as a curved shell and capable of forming an accommodation space in conjunction with the first wall brick main body for accommodating a planting pot, the rear surface of the first wall brick main body and the front surface of the second wall brick main body are respectively formed with a first recess pattern and a second recess pattern which can be adhered for forming a water flow channel for guiding a water flow, and the rear surface of the first wall brick main body and the front surface of the second wall brick main body are respectively formed with a first electric recess pattern and a second electric recess pattern which can be adhered for forming an electric channel to allow an electric wiring to be installed for supplying power to an electric device. As such, the present invention can provide both of a hidden water flow channel and a hidden electric channel.本發明揭示一種複合型壁磚的製作方法,包括備製第一壁磚本體、備製第二壁磚本體、備製承載本體、貼合承載本體及第一壁磚本體、貼合第一壁磚本體及第二壁磚本體,其中承載本體為曲面殼體,可與第一壁磚本體形成容置植栽盆的容置空間,第一壁磚本體的背面及第二壁磚本體的正面分別具有第一、第二凹陷圖案,可貼合而形成水流管道,導引水流,而第一壁磚本體的背面及第二壁磚本體的正面分別具有第一、第二電氣凹陷圖案,可貼合而形成電氣管道,用以安置電氣連接線路,提供電源給電氣裝置。因此,本發明能同時提供隱藏式的水流管道及電氣管道。S10‧‧‧備製第一壁磚本體S20‧‧‧備製第二壁磚本體S30‧‧‧備製承載本體S40‧‧‧貼合承載本體至第一壁磚本體S50‧‧‧貼合第一壁磚本體至第二壁磚本體