In the image, the actor is seen with over a dozen school children, who seemed more than happy posing with the "Wanted" star.
The children are dressed in a blue and white school uniform while the "Dabangg" star can be seen in the middle wearing a red shirt and holding a toddler.
"Sets of 'Sultan'. Shot with these kids," Salman tweeted on Friday night.
Directed by Ali Abbas Zafar, "Sultan" is being produced by Aditya Chopra under Yash Raj Films banner.
Salman will be seen playing the role of a wrestler in the film and has also gained weight.
The film also stars actress Anushka Sharma, who will be seen sharing screen space with the "Bajrangi Bhaijaan" actor for the first time.