The 59-year-old artiste took to Instagram to share the news with her fans and followers.
She also urged people to help her in bringing the total number of schools to 14 in the African country, through her charity, Raising Malawi and non-profit organisation, Build On.
"Let's start 2018 off right! I'm challenging you all to stand up, come together and be the change you want to see in the world!
"This year we'll begin by building four brand new schools in the Kasungu District of Malawi with Raising Malawi and buildOn! That's 14 schools in total that will help thousands of kids get the education they so rightfully deserve! Now is the time! Join the revolution of love!" Madonna wrote alongside her picture with the Malawian children.
Madonna adopted her children David Banda (12) and Mercy James (11) in 2006 and 2009 respectively, and twins Esther and Stella Mwale (five) earlier this year from Malawi.
She has a daughter, Lourdes (21) and a son, Rocco (17), from previous relationships.