Ighalo was again on target for the sixth time since he returned to China from the 2018 FIFA World Cup.
The 30-year-old is in the scoring form of his career as his goals have proved pivotal for Changchun Yatai in recent weeks.
Beijing Renhe, however, took the lead in the Chinese Super League (CSL) encounter through Cameroonian forward Benjamin Moukandjo as early as the third minute when he got on the end of a ball by Senegal strike partner Makhete Diop.
Ighalo scores 2 goals against Beijing Renhe
Ighalo and his teammates found the equaliser in the 17th minute through Dadi Zhou.
The Nigerian striker, however, put his side ahead with their second of the game in the 25th minute.
Ighalo also returned to goalscoring form after his last against on Saturday, August 4.
Ighalo scored another penalty to seal the game for Changchun Yatai in the 84th minute to seal the result.
The goal turned out to be the winner for Changchun Yatai as the three points move them up the table to 24 points from 18 games played this season.