The suspension strap assembly for a punching bag is an apparatus that is configured for use in physical training. The suspension strap assembly for a punching bag suspends a heavy bag in a manner appropriate for use in the physical training for boxing activities. The suspension strap assembly for a punching bag comprises a superior mount, a suspension apparatus, and a heavy bag. The suspension apparatus attaches the heavy bag to the superior mount. The heavy bag provides a target used for physical training. The superior mount suspends the suspension apparatus and the heavy bag from a load bearing structure such that the load of the suspension apparatus and the heavy bag are incorporated into the load path of a building or structure.