The prestigious award capped a memorable season for the dynamic Rugby World Cup winner, who was a star performer for the Springboks during their successful 2019 campaign in Japan.
Kolbe also won the award for the best Top 14 player at the World Cup, beating Fiji's Semi Radradra and France's Damian Penaud, while he also won the the award for the Try of the Season.
The accolades come a little over three weeks after the Boks had collected the Rugby World Cup for the first time since 2007, with a 32-12 win over England in the RWC final at the International Stadium Yokohama in Japan.
The 26-year-old speedster was one of the standout performers of the 2019 RWC tournament and was nominated alongside fellow Springbok and eventual winner Pieter-Steph du Toit for the World Rugby Player of the Year Award.
Kolbe and fellow wing Makazole Mapimpi became the first two South Africans two score a try each in a RWC final.
The former Blitzbok and DHL Stormers player also helped his club Toulouse to the French domestic title in June.
Kolbe, who made his Test debut last year after joining Toulouse from the DHL Stormers in 2017, scored six tries in 16 league appearances before Ugo Mola's side lifted the Bouclier de Brennus for a record-extending 20th time at the Stade de France.
Kolbe has played in 14 Tests for the Springboks to date and scored eight tries for a total of 40 points.