The invention discloses an electric power grid ultra-high voltage electric transmission and distribution line composite insulator slicing sampling apparatus, which comprises a cutter blade installation seat (9) and a cutter blade (10), wherein the cutter blade (10) is fixedly arranged on the cutter blade installation seat (9). The electric power grid ultra-high voltage electric transmission and distribution line composite insulator slicing sampling apparatus is characterized by comprising a racket (1), a clamping pincers (2), a motor (4), a drive belt (5), a cutter blade moving screw rod drive nut (6), a cutter blade moving screw rod (7) and a rotation connection block (8). According to the present invention, the operation of the whole sampling process of the apparatus is convenient, and the automatic cutting is achieved through the matching of various devices of the whole apparatus; the whole apparatus has the simple structure, the whole slicing process can be completed at the high-altitude, and the condition that the composite insulator is disassembled from the line, is conveyed to the ground and then is cut and sampled is not required; the charged work can be directly performed; the structure of the whole set of the apparatus is simple, and the weight is light; and different sampling requirements can be met, and the sheets with different thicknesses can be cut.