The invention discloses a positioning clamp of cutting equipment for trunking with holes. The positioning clamp comprises a top plate. A fixed clamping plate is fixed to one side of a horizontal supporting plate. A first saw plate receding groove penetrating through the lower end face of the fixed clamping plate is formed in the fixed clamping plate. Horizontal pressing rod insertion grooves are formed in the positions, on the two sides of the first saw plate receding groove, of the fixed clamping plate. Vertical positioning rod insertion grooves are formed in the positions, on the lower sidesof the pressing rod insertion grooves, of the fixed clamping plate. A plurality of horizontal guiding shafts are connected with the upper end of the fixed clamping plate in an inserted mode. The guiding shafts are fixed to the upper end of a movable clamping plate. A second saw plate receding groove corresponding to the first saw plate receding groove is formed in the movable clamping plate and penetrates through the lower end face of the movable clamping plate. Pressing rods and positioning rods which correspond to the pressing rod insertion grooves and the positioning rod insertion groovesare formed at the positions, on the two sides of the second saw plate receding groove, of the movable clamping plate. A clamping air cylinder is fixed to the upper end of the movable clamping plate. Apiston rod of the clamping air cylinder penetrates through the movable clamping plate to be fixed to the fixed clamping plate. Trunking cutting positions can be effectively clamped, and the damage situations of flattening and cutting can be avoided.