The invention discloses a food cutting device which comprises a cutting piece and a cutting frame arranged at the lower end of the cutting piece. The cutting piece internally comprises a transverse rod, a cutting module and a transmission rod, the two sides of the transverse rod are each fixedly provided with a downwards-extending insertion rod, a cutting base arranged opposite to the cutting module is arranged at the top end of the cutting frame, insertion holes are formed in the positions, opposite to the lower ends of the insertion rods, in the cutting frame, sliding grooves arranged in a left-and-right equal manner are formed in the positions, between the insertion holes, in the cutting frame, and a stopping block fixedly connected with the cutting frame is arranged between the sliding grooves; the top end of each sliding groove is provided with a hole groove penetrating the outer wall of the cutting frame and communicated with the bottom end of the interior of the cutting base, an ejection pin is arranged in each hole groove, and a pushing groove is formed in the bottom end of each sliding groove; and a sliding block is arranged in each sliding groove, an elastic piece is arranged between each sliding block and the corresponding stopping block, and an ejection pin groove is formed in the top end of each sliding block. The food cutting device is simple in structure, automatic separation can be achieved after cutting is finished, the manufacturing cost is low, and maintenance is convenient.