The invention discloses a method for quickly installing a cabinet body. The method comprises the steps of: processing two side plates and a door plate; processing a back plate, a top plate and a bottom plate, drilling installing holes for connecting hidden hinges in the back plate, the top plate and the bottom plate, respectively drilling pin holes for connecting wood pins in the top plate, the bottom plate and the back plate, carrying out grooving on the back plate, the top plate and the bottom plate, and then assembling the cabinet body. According to the method for quickly installing the cabinet body, disclosed by the invention, a previous three-in-one connecting method is changed, the working efficiency is greatly increased, the labor is reduced, and the construction and installation efficiency is quickened; meanwhile, the weight capacity of the cabinet body is also greatly increased, the firmness of a cabinet body structure is enhanced, and the stability that the strength of the cabinet body is constant after the cabinet body is repeatedly disassembled, assembled and recovered is enhanced; the installing efficiency of the cabinet body can be obviously increased, the labor cost and the installing cost are effectively reduced, and the stability that the strength is constant after the cabinet body is repeatedly disassembled, assembled and recovered can be fully ensured.