The invention discloses a novel watermelon cutter. The novel watermelon cutter comprises a base plate, a left supporting pillar, a right supporting pillar and a cover plate, wherein the left supporting pillar and the right supporting pillar are symmetrically arranged at the left end and the right end of the top of the base plate correspondingly; and the cover plate is arranged at the top of the left supporting pillar and the top of the right supporting pillar. A rotating motor is arranged at the top of the cover plate. A heat removing assembly is arranged on the rotating motor. A cutting toolis arranged at the bottom of the cover plate in a rotatable mode and further located between the left supporting pillar and the right supporting pillar. The cutting tool is connected with the rotatingmotor through a rotating shaft. A left vacant groove and a right vacant groove are symmetrically formed in the bottom of the right end face of the left supporting pillar and the bottom of the left end face of the right supporting pillar separately. A lifting platform capable of sliding up and down is arranged between the left vacant groove and the right vacant groove in a matched mode. The wholenovel watermelon cutter is simple in structure, low in manufacturing cost, easy to operate, convenient to use, capable of greatly improving the watermelon cutting homogeneity and watermelon cutting efficiency, further capable of replacing the manual watermelon cutting mode completely, good in practicability and suitable for application and popularization.