The invention relates to a bent asymmetrical burner with a Venturi tube. The bent asymmetrical burner comprises a fuel discharge assembly, an air pipeline, a burner wall, an igniter and the Venturi tube. The fuel discharge assembly comprises a discharge tip, a fuel lift pipe and a flame stabilization structure. An air channel surrounded by the burner wall penetrates through the burner wall to extend. The flame stabilization structure is arranged on the first inner side of the burner wall and located on one side of the axis of the burner wall. The flame stabilization structure is arranged at the outlet end of the burner wall. The Venturi tube is arranged on the second inner side of the other side of the axis. A vacuum air suction pipe of the Venturi tube extends out of the outlet end of the burner wall. A guide vane is further arranged inside the air pipeline. The bent asymmetrical burner solves the problems that excessive NOx is generated and occupied space of equipment is large due to the fact that the temperature inside a heat supply hearth of an existing burner is too high.