The invention belongs to the field of blasting works, and specifically relates to a spaced charging device of blasting work blastholes; the spaced charging device comprises an explosive box, a separation mechanism, an upper baffle, a lower baffle and a reset spring; the explosive box is tubular, and the interior of the explosive box is provided with a cylindrical cavity; the top of the explosive box is provided with the upper baffle; the reset spring is arranged between the explosive box and the upper baffle; the bottom of the explosive box is provided with the lower baffle; the separation mechanism comprises an operating shaft, an upper baffle bolt, a fixture block, a separation rope and a bolt separation rope; an upper support unit comprises an upper barrier strip, a first spring, a second spring and a soil shield; a lower support unit comprises a lower barrier strip, a gear, a flexible rack, a spring, a first mounting hole, a second mounting hole and a fixture block hole. The spacedcharging device provided by the invention is applicable for spaced charging of solid explosive, liquid explosive, powder explosive or emulsion explosive, and explosive barrels are used for charging,so that the influence of humid environment on the explosive is reduced, and the spaced charging device has the advantages of easy operation, accurate charging position, firm installation and high installation efficiency.