The Commonwealth Games star, competing in front of his home crowd at the Plymouth Life Centre, finished more than 100 points ahead of his nearest challenger in his age group.
Dixon scored 482.95 points, with Leeds’ Anthony Harding second on 379.25 and Southend’s Connor Van Dal third with 377.75 points.
Earlier in the day, Dixon had topped qualifying for both A and B categories, ahead of fellow internationals Matty Lee and James Heatly.
Dixon’s British Elite Junior Championship success follows on from his impressive display at the senior event, which was also staged at the Life Centre in February. The city diver, who turns 15 in two weeks’ time, came second at the British Senior Championships behind Tom Daley.
Dixon’s medal on Saturday evening took Plymouth Diving’s haul for the four-day competition to three, following on from Shanice Lobb’s silver in the girls’ A platform final and Cody Powell-Tuckett’s bronze in the girls’ B platform competition. Meanwhile, Kayleigh Sinclair came fifth in the girls’ A one-metre event.
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