The utility model discloses an experimental foam generator, belonging to the foam generation technical field. The generator mainly comprises a magnetic conical rotor, an outer cylinder, a seal cover, a sealing cap and a magnetic disc, wherein the seal cover is arranged at the bottom of the conical inner cavity of the outer cylinder, the seal cover and the conical inner cavity of the outer cylinder form a conical cavity, the magnetic conical rotor is arranged in the conical cavity, a plurality of inner arc grooves are arranged on the sidewall of the magnetic conical rotor, a plurality of outer arc grooves are arranged on the inner wall of the outer cylinder, when the magnetic conical rotor rotates, the inner arc grooves and the outer arc grooves are partially superposed, the sealing cap is arranged at the lower side of the seal cover at the bottom of the outer cylinder, the end face of the sealing cap is butted against the bottom of the seal cover, an inlet is opened at the position of the outer cylinder bottom corresponding to the bottom of the magnetic conical rotor, an outlet is opened at the position of the outer cylinder top corresponding to the top of the magnetic conical rotor, and the magnetic disc drives the magnetic conical rotor to rotate. Compared with the prior art, the foam generated by using the generator is uniform and has stable mass and small dead volume, and the foam generator is widely used in the fuel scavenge experiment for generating the foam.