The sparring arms heavy bag boxing apparatus is a pair of simulated sparring opponent arms as a jab arm and a power arm of different lengths adjustably attached to a heavy bag with a stabilizing weight attached to the bottom of the heavy bag to stabilize the motion of the heavy bag for sparring practice even with out a training partner. The jab and power arms may optionally be weighed. Use of the sparring arms heavy bag boxing apparatus promotes a boxer's capacity to find distance and range with accuracy and precision.