The former Sabah DAP chief handed his application form to Sabah MCA Chief Wilfred Yong witnessed by party President Datuk Seri Dr Liow Tiong Lai at a Chinese restaurant in D' Junction.
According to Liow, MCA had the blessings of Prime Minister Datuk Seri Najib Tun Razak as the BN Chairman and Chief Minister Datuk Seri Musa Aman to accept Hiew into the party.
"I chose the MCA because the party defends the position of the Chinese and, at the same time, serves all the races," he said.
Hiew said he decided to join the MCA after several of the party's leaders in Sabah invited him to join the Barisan Nasional (BN) component party.
"After quitting the DAP to become an independent assemblyman, I found it difficult to consolidate my position and win the people's confidence because I had no party backing," he said.
Previously reported to have join Parti Bersatu Rakyat Sabah (PBRS) Hiew when asked for comment said he found it difficult because of objections from other State-based BN component parties.
"I have contacted (PBRS President) Tan Sri Joseph Kurup (and told him about this) and he understands," he said.
Hiew also said he has no regrets leaving DAP for BN because what was important to him was to serve the people in a meaningful way that is through the government, which happened to be a BN government.
According to him, he had built up DAP's name in Sabah alone until 2013 when DAP managed to get two parliament and four state seats.
He said it was him and Edward Ewol Mujie who literally forced Kota Kinabalu MP, Jimmy Wong to join DAP.
Hiew who was replaced by Wong to head DAP in Sabah finally left the party in September last year citing he could no longer tolerate "ungrateful leaders in DAP Sabah."
Hiew also said that there was a need for people to understand certain issues before hitting out at the government.
"There are so many things that people do not really understand but simply criticise the Government such as on Esscom.
"Many people thought that Esscom is the top chain of command but after attending the briefing by Esscom Director General Datuk Mohammad Mentek, this was not the case. Esscom is only the coordinating body," he said.
Meanwhile, Yong in welcoming Hiew into MCA said the party now has a representative in the State Legislative Assembly after former Kapayan Assemblyman, Datuk Edward Khoo lost in the last election.
"MCA now has the platform to voice out not only issues concerning Luyang but also the State," said Yong.