The invention discloses a new energy automobile trunk with a separation device. The trunk comprises a trunk body, connection blocks are fixedly arranged on the front portions and the rear portions of the left inner side wall and the right inner side wall of the trunk body, and the connection blocks on the right side correspond to the connection blocks on the left side one by one. Corresponding grooves are formed in the opposite wall faces of the connection blocks on the left side and on the right side, a connection turnover plate is sleeved with each groove in an inserted mode, and an inserting hole is formed in the inner end of each connection turnover plate. A rotary shaft is sleeved with each groove in an inserted mode, the two ends of each rotary shaft are fixed to the two inner side walls of the corresponding groove, each rotary shaft is sleeved with a torsional spring in an inserted mode, and each rotary shaft and the corresponding torsional spring are inserted into the corresponding inserting hole; one end of each torsional spring is fixed to the inner side wall of the corresponding inserting hole, the other end of each torsional spring is fixed on the corresponding rotary shaft, and the outer ends of the connection turnover plates are provided with hook parts; the top of each side partition plate is provided with an upper bending edge, the upper bending edges are inserted into the hook parts of the corresponding two connection turnover plates in a sleeving mode. When the trunk is detachably provided with the side partition plates, middle partition plates and small partition plates, separation is achieved, accordingly the trunk brings convenience to classified placement, and articles are convenient to place.