The invention discloses a dynamic balance test and correction system for a diamond micro-diameter milling cutter. The system includes two parts: a micro-grinding workbench and a dynamic balance measurement workbench, wherein: the micro-grinding workbench includes a precision air-floating spacer Vibration platform, base, precision motion table, piezoelectric ceramics, electric control rotary table, collet, CCD camera, CCD mounting frame, vertical one-dimensional precision guide rail, connecting plate, two-dimensional precision motion platform A, grinding axis Mounting frame, high-speed grinding spindle, pneumatic chuck A, grinding wheel grinding head, two-dimensional precision motion platform B; the dynamic balance measurement table includes photoelectric sensor, industrial computer, vibration sensor, dynamic balance spindle, pneumatic chuck B and Dynamic balancer. The system can detect the dynamic balance of the micro-milling cutter and deal with the unbalanced amount, and can solve the problem that the precision of the diamond micro-milling cutter is reduced during the micro-milling process due to the dynamic unbalanced amount after the diamond micro-milling cutter is prepared or worn.