The 21-year-old pugilist dominated the proceedings and all three judges declared him a clear winner Sunday night.
Sangwan will take on New Zealand's Davis Nyika for a place in the semifinals.
Earlier, Sangwan's compatriot Manoj Kumar also booked a berth in the quarters of the men's 64kg category with a 2-0 win over Canada's Arthur Biyarslanov.
Manoj will fight it out against Samuel Maxwell of England.
Saurav Ghoshal loses in squash
Meanwhile, India's Saurav Ghosal was outclassed by former World No.1 James Willstrop of England in straight sets in the men's singles squash semifinals at the Scotstoun Squash Campus here.
The 27-year-old fourth seed lost 8-11, 8-11, 5-11 Sunday night.
Ghosal's hard-fought 3-2 victory over New Zealand's Campbell Grayson in the quarterfinals had made him the first Indian to reach the singles semifinals since the sport was introduced in the Games programme in 1998.
Ghosal, though, failed to replicate his earlier performance and had no answer to the guile and power of the Englishman, who is seeded second.
India had already suffered a major setback when medal hopeful Dipika Pallikal was dumped out in the quarterfinals by Alison Waters of England.
Sixth seed Dipika squandered a one-game advantage to go down 11-8, 2-11, 9-11, 6-11 to the English fourth seed.