The invention provides a novel Mach probe and relates to the technical field of vacuum plume parameter diagnostic equipment. The provided novel Mach probe comprises a supporting base, a first collection module and a second collection module, wherein the supporting base comprises a first mounting channel and a second mounting channel; the first collection module is mounted in the first mounting channel through a first insulating assembly and used for collecting flow field ions, and the plane where the first collection module is located is parallel to a first collection end face in a plume flowdirection; the second collection module is mounted in the second mounting channel through a shielding insulation assembly and used for collecting the flow field ions, and the plane where the second collection module is located is perpendicular to a second collection end face in the plume flow direction. According to the provided novel Mach probe, the ions are collected through the collection end faces of the two modules, probes do not interfere with each other on flow fields due to an ultra-high flow rate, and measurement results are more accurate.