Tripura, who had conceded a huge 389-run first innings lead to Assam, had a bad start after resuming the day at 156 for three as they lost overnight batsmen Abbas Ali (12) and Samrat Singha (79) to pacer Abu Nechim.
Yogesh Takawale scored 68 off 109 balls and was well supported by Timir Chanda as the pair added 72 for the seventh wicket.
However, once Takawale fell, Nechim and Jamaluddin Syed Mohammed combined to take regular wickets and dismiss Tripura for 334.
Assam secured seven points for winning the match by an innings while Tripura got none.
Brief Scores:
Assam: 525 for 5 dec beat Tripura 136 and 334 all out in 120.5 overs (Samrat Singha 79, Yogesh Takawale 68; Abu Nechim 4/78) by an innings and 55 runs.