The pair combined on Thursday to win team pursuit gold for the third successive season, before Trott added the omnium and scratch race to her tally.
Archibald retained her individual pursuit title and won the elimination race to take Britain's gold count to six, with three bronze medals won as well.
"For me that's my tenth European title so I'm super happy with that,” Trott said on the British Cycling website.
“It's just been great. I absolutely love the Euros. I did it from the very first one in 2010 and I've been a European champion in every one I've competed at, which I guess is quite lucky. So yeah I've really enjoyed this whole week of racing."
Archibald said: “Pretty happy, pretty sweaty. All the things you’d expect.
“I think you’ve got to go in imagining you’re going to win. You don’t imagine celebrating or anything like that but you think of the best outcome and how you can get to it.”
Britain's men also won the team pursuit for the third year in a row, while Jon Dibben and Chris Latham won bronzes in the omnium and elimination race respectively. The third bronze came from Ciara Horne in the individual pursuit.
Country G S B Total
1 Great Britain 6 0 3 9
2 Netherlands 5 2 2 9
3 Russia 2 3 3 8
4 Poland 2 1 2 5
5 Spain 2 0 1 3
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