The invention discloses an aluminum-wood combined structure for a root part of a non-standard layer wall column and a construction method thereof. The aluminum-wood combined structure comprises an aluminum alloy die plate, a wooden die plate, a long screw and back edges, wherein the aluminum alloy die plate and the wooden die plate are correspondingly arranged at two sides of a wall body to be poured; the long screw penetrates through the wall body to fix the aluminum alloy die plate and the wooden die plate; the back edges are arranged at the outer sides of the aluminum alloy die plate and the wooden die plate and are used for compressing and fixing the die plate; the aluminum alloy die plate is arranged above the wooden die plate; and the bottom edge of the aluminum alloy die plate is connected to the top edge of the wooden die plate. According to the aluminum-wood combined structure, the upper layer is provided with the aluminum alloy die plate used for a standard layer, thus a K plate can be placed directly according to common construction procedures, and the connection between the upper standard layer and the lower nonstandard layer is facilitated; in addition, a limiting partmatched with the aluminum alloy die plate is arranged on the wooden die plate, so that the pouring can be performed at one time; the integrity is high; and the slab staggering problem can be effectively avoided.