The fatal collision happened around 12:15 p.m. Friday at Fox Hay Feed & Grain, at 3542 Gillespie Avenue in Acton, according to a California Highway Patrol report.
Clemente Delgado of Acton was walking towards a hay loading area, as 71-year-old Betty Marks was backing her 2005 Mercedes Benz into that same area, according to the CHP report.
The Mercedes Benz struck Delgado and pinned him against multiple stacks of hay, the CHP report states.
Bystanders administered CPR on Delgado until emergency medical personnel arrived and took over the CPR efforts. Then Delgado was transported to Palmdale Regional Medical Center, where he died around 1:03 p.m. of blunt force trauma to the head and torso, the CHP report states.
Marks was not arrested in the incident and driving under the influence is not being considered a factor, CHP officials said.
The incident remains under investigation.