The number of categories will be reduced from 109 to 78 with many existing categories merged, while some will be dropped completely.
Each category must now start out with at least 40 contenders instead of 25.
Grammy president Neil Portnow said It ups the game in terms of what it takes to receive a Grammy.
The top awards, which include best album, song of the year and best new artist, will remain the same.
Separate male and female vocal categories in fields such as pop, R&B and country are among those being merged, with men and women competing together.
Shortlists that are being ditched include best Native American album and best spoken word children’s record.
The new rules also state that shortlists which make between 25 and 39 nominations will only have three finalists on the big night.
