The utility model relates to the power supply technology field and particularly relates to a switch cabinet handcart operation device. The switch cabinet handcart operation device is characterized in that an inner hexagon swivel comprises a sleeve, an inner liner and a fastening nut, wherein an inner wall of the sleeve and an outer wall of the inner liner are provided with a groove and a boss which are mutually matched, cross sections of the inner wall of the sleeve and the outer wall of the inner liner are in the plum blossom shapes which are mutually matched, a cross section of an inner wall of the inner liner is in the inner hexagon shape, a back portion of the inner liner is fixedly connected with the sleeve, circumferences of a central portion and a front portion of the inner liner are provided with at least two rows of parallel fastening grooves in an array mode, and an outer wall of a front end of the inner liner is a conical structure and is provided with threads in matching with the fastening nuts. According to the switch cabinet handcart operation device, the inner hexagon swivel is sleeved at an outer hexagon pin head of a handcart operation screw, a front end portion of the inner liner is enabled through a fastening nut to tightly hold the outer hexagon pin head of the handcart operation screw, the switch cabinet handcart operation device is turned in an anticlockwise or clockwise mode to realize isolation or contact between a switch handcart and a live-line part, and the switch cabinet handcart operation device has advantages of simple operation, safe use and reliable work.