The invention discloses a combined tray and an application method thereof. The combined tray comprises a female tray and at least one male tray; the female tray is mainly composed of a tray body and a plurality of bearing units distributed on the working surface of the tray body in a rectangular array mode, and cargo forking channels are formed between the adjacent bearing units; the male tray is mainly composed of a tray body and a plurality of tray loading holes formed in the tray body in a rectangular array mode, and the area of each tray loading hole is at least larger than that of each bearing unit on the female tray; the part, between every two adjacent tray holes, of the tray body of the male tray forms a bearing beam of which the width is smaller than the width of each cargo forking channel on the female tray; and the forming array of the multiple ray loading holes in the male tray corresponds to the distribution array of the multiple bearing units on the female tray. The application method of the combined tray comprises the steps that the male tray loaded with stacked cargoes is lifted to the position above the no-load female tray so that the male tray can penetrate through the bearing units on the female tray, and the stacked cargoes are carried by the female tray; the male tray is installed and located on the female tray in a sleeving mode; the stacked cargoes loaded on the female tray are forked through a forklift; and the no-load male tray is taken out.