Having beaten her biggest challenger for the title, Van Lal Duati in the quarters, the 22-year-old dynamo easily claimed the top podium finish with a 14-point margin win in the fly weight division.
It was Pinki's maiden gold medal at nationals in eight appearances.
"The gold medal took a long time coming, I came very close on a few occasions in past and lost it in the end. Now that I have won it, it seems is every bit worth the wait. I am extremely happy with my performance over the last five days and the win has given me a lot of confidence as well. I look forward to the national camp now," she said.
However, the bout of the day came in the middle weight division with Arafura Games silver medallist Pooja Rani of RSPB prevailing 16-7 over 2012 Asian Games bronze medallist Kavita Goyat of Haryana.
Both boxers threw in a lot of punches in the first round but it was Goyat, a veteran in the sport, who nosed ahead with a 1-0 lead.
In the second though, Rani came back strongly with some heavy hitting. Goyat still held the lead (5-4) midway through the bout, but seemed to be losing advantage.
Beginning of the third round the tables turned in favour of the Railways boxer, she started to dominate the game with her cracking jabs and three punch combination. More