Xu, who won five of the ten rounds last season, opened up the new campaign with victory on home soil in Changchun at the start of the month and built on it second time out.
The 22-year-old just scrapped into the top four after final one to reach final two, qualifying in fourth, but once there she was unstoppable she produced a score of 104.50.
Xu was the only skier to better the 100-point barrier with Australia's Lydia Lassila, third in qualifying for final two, taking second place for the second time with an effort of 95.52.
Yang Yu, Xu's Chinese team-mate, went from first in final one to third in final two with 91.29 while Lassila's fellow Australian Laura Peel was fourth after scoring 84.39.
Xu leads the overall aerials World Cup standings with 200 points, Lassila second with 160 while another Australian Danielle Scott, who fifth in Canada, is third with 85.
Meanwhile in the men's event Dmitri Dashinski also picked up his second straight World Cup win however unlike Xu it was his first appearance on the circuit this season.
Dashinski won the final round of last season in Myrkdalen-Voss and picked up where he left off in Val Saint Come after also just qualifying out of the first final and into the second final in fourth.
The 35-year-old scored 120.24 in the second final to take the win with home hope Travis Gerrits second with 114.61 and China's Zhou Hang third ahead of Australian David Morris with 100.45.
Dashinski goes straight in at third in the overall World Cup standings with 100 points, nine behind Gerrits in second and 40 behind leader Jia Zongyang, who was sixth in Canada.