"Abolishing triple talaq...is definitely not women's freedom. Women need to be educated and (should become) independent," Ms Nasreen tweeted.
"Abolish 1400 yrs old Quranic laws. (We) need modern laws based on equality," she said.
In a series of tweets, Ms Nasreen said: "Why only triple talaq? Whole Islamic law or Sharia law should be abolished. All religious laws should be abolished for the sake of humanity."
"Religions including religious laws and rituals are anti-women. Period," she said.
Earlier in the day, before the verdict was announced, the writer tweeted: "India's progressive people are waiting to see triple talaq being abolished."
The Supreme Court held triple talaq being practised by the Muslim community as "unconstitutional", "arbitrary" and "not part of Islam".
A five-judge constitutional bench, by a 3:2 majority judgement, said there is no constitutional protection for triple talaq.