Barrios, 25, had her best shot in the second round, enough to secure the runner-up position behind American Stephanie Brown, who had had a 64.74 first shot.
The Cuban athlete had won bronze at the Osaka World Championships last year. She opened this Olympic tournament with another over-63 meter shot, to pass Ukrainian Olena Antonova's 62.59.
Barrios had a shot sequence that included 62.22, 62.12, 60.30 and a foul. This silver medal is the fifth for the Cuban delegation at Beijing and the second this day after the one obtained by cyclist Yoanka Gonzalez in the race by points.
Cuba 50 