The invention discloses an air fryer with a simple assembly structure, which comprises an upper shell, a lower shell connected to the mouth of the upper shell, and a handle arranged on the side of the upper shell; the upper shell and the lower shell A mating connection forms an inner cavity; the inner cavity is composed of an upper cavity built in the upper shell, a lower cavity built in the lower shell, and a cooking cavity; wherein, the upper cavity occupies a height of 2 / 3, the lower cavity occupies 1 / 3 of the inner cavity height. The present invention overcomes the deficiencies of the prior art, has ingenious design, reasonable structure, simplifies the assembly scheme through the improvement of the structure, saves the installation process, and realizes a new structural mode; it is also convenient for after-sales maintenance; in particular, it saves costs and improves the product Competitiveness; In terms of heat dissipation, it shortens the cold air flow path, accelerates surface heat dissipation, and prolongs the service life.