The invention relates to a loading mechanism with metamorphic function, comprising a bucket overturning mechanism and a bucket lifting mechanism. The topological structure of the loading mechanism is changed as required when a loading task is executed. When the loading structure executes tasks of a bucket loading stage, a bucket overturning stage, a unloading stage and a bucket revolving stage, the topological structure of the loading mechanism is the bucket overturning mechanism; and when the loading mechanism executes the tasks in a bucket lifting stage and a bucket descending stage, the topological structure of the loading mechanism is the bucket lifting mechanism. The loading mechanism can change the topological structure according to the operational requirements in different stages. The loading mechanism can complete the tasks of each stage such as overturning, lifting, loading and unloading by one motor. By applying the loading mechanism disclosed by the invention, the defects that oil of the traditional hydraulic loading mechanism leeks and the reliability is difficult to guarantee; and meanwhile, the manufacturing cost is low, and the loading mechanism is convenient to maintain.