Disclosed is a prefabricated flower garden which can adjust the length, width and height according to the installation environment； is easy to assemble and is sturdy； can form a bench on the outside to provide a seating area； and can be moved. The prefabricated flower garden of the present invention comprises: a corner joining member in which a first support plate and a second support plate are arranged while being spaced apart from each other at right angles； a front plate and a rear plate stacked in a multi-stage manner in such that the end portion slides from the upper side to the lower side in a space defined by the first support plate, a first inner plate, a second inner plate, and a second bend plate； and a left side plate and a right side plate stacked in a multi-stage manner in such that the end portion slides from the upper side to the lower side in a space defined by the second support plate, the second inner plate, the first inner plate and a first bending plate.설치환경에 따라 길이나 폭 그리고 높이를 조절할 수 있으며, 조립이 용이하고 견고하며, 외측에는 벤치를 형성하여 휴식공간을 제공할 수 있으며, 이동가능한 조립식 화단이 개시된다.
