Muay Thai Phayahong started training in Muay Thai at the age of 9 years old in order to help her family. She had her first fights for the Sor.Sutthichai camp in the Buriram province and gained her first regional title at the age of 13. On February 25, 2018 Phayahong faced COMACHI at KODO 3 for the interim WPMF World Pinweight title. She won the fight by unanimous decision. They rematched on February 24, 2019 at KODO 4 in Japan for the undisputed WPMF World Pinweight title. Phayahong won the fight by unanimous decision. On March 28, 2021 Phayahong faced Faachiangrai Sor.Saenchai in Nakhon Ratchasima for the Thailand 102 lbs belt. She won the fight by decision to capture the title. Phayahong faced Lookmee P.K.Viengchan at Legends Fighting Championships on September 3, 2022. She won the fight by a second-round technical knockout. Phayahong made her next appearance with Legends Fight Championship on November 20, 2022, as she was booked to face Margaret Wanek. She won the fight by decision. In 2024, as a fighter from Banchamek Gym, she participated twice in the Japanese edition of 'RWS.' In her first match, she lost to Japanese fighter
Saya Ito, but she won her second match by unanimous decision against another Japanese fighter, Kana. In her next fight, Phayahong won by knockout against Nongparnfah at the famous
Rajadamnern Stadium during the 'All Star Fight' event. On October 19, 2024, Payahong defeats
Saya Ito by unanimous decision, becoming the first-ever
Rajadamnern Stadium Female Minimumweight Champion. On December 28, 2024, Phayahong Banchamek successfully defends the
Rajadamnern Stadium Female Minimumweight Championship by defeating Thailand’s Kaosuay Por.Kobkua via unanimous decision at the RWS promotion event.
Kickboxing career Phayahong challenged the
Krush Women's Atomweight champion Miho Takanashi in her promotional debut at Krush 106 on October 13, 2019. She lost the fight by unanimous decision. Phayahong faced Moe Takahashi at Krush 111 on February 24, 2020, in her second appearance with the organization. She won the fight by unanimous decision. On May 12, 2022,
K-1 announced that they would be holding an atomweight Grand Prix, which would crown the inaugural champion, at the all-female kickboxing card at
K-1: Ring of Venus on June 25, 2022. Phayahong faced the four-time
Shoot Boxing tournament winner
Mio Tsumura in the tournament quarterfinals, which she won by unanimous decision. Phayahong advanced to the tournament finals, where she faced the reigning
Krush Atomweight champion Miyuu Sugawara. The fight was ruled a majority decision draw after the first three rounds, with one judge scoring the bout for Phayahong. She was awarded the split decision after an extra fourth round was fought. Phayahong made her first
K-1 Women's Atomweight title defense against
Miyuu Sugawara at
K-1 World GP 2023: K'Festa 6 on March 12, 2023. It was an immediate rematch of their 2021 K-1 Grand Prix finals bout, which Phayahong won by split decision. She lost the fight by majority decision. Phayahong faced
Kira Matsutani at
K-1 World GP 2023 on July 17, 2023. She lost the fight by unanimous decision, after an extra fourth round was contested. Phayahong won five gold medals in amateur kickboxing at
WAKO-sanctioned competitions across multiple categories between 2023 and 2024.
Rajadamnern World Series Phayahong faced
Saya Ito for the inaugural
Rajadamnern Stadium Women's Minimumweight (105 lbs) title on 19 October 2024. She won the fight by unanimous decision. Phayahong was scheduled to defend her
Rajadamnern Stadium Women's Minimumweight (105 lbs) title against
Mongkutpetch KhaolakMuaythai at a Rajadamnern World Series event on April 5, 2025. She lost the fight by unanimous decision. ==Championships and accomplishments==