The utility model discloses a portable electric power high voltage transmission lines operation is thrown and is hung catapult, including tumbler ring, shifting sledge and catapult body, power module is installed to the below of catapult body electromagnetic controller is installed to power module's top, electromagnetic controller's top is provided with fixed iron plate, shifting sledge fixed mounting is in the inside of catapult body, the internally mounted of spacing recess has the removal pulley, it is connected with fixed iron plate through connecting the dead lever to remove the pulley. The utility model discloses at first integral jettison device, it is small, need not assemble, conveniently carry, secondly this catapult adopts the mode of launching of electromagnetic type, can change the size of elasticity according to actual conditions by oneself, and moreover, elasticity is enough big, can use to higher high -voltage line, and it is more convenient to use.