Anastomosis of small bowel is done by :
Good surgical technique is more important than the choice of suture material :

Gentle handling of the bowel.
Adequate hemostasis.
Meticulous approximation of well-vascularized bowel.
Tension-free anastomosis.
Suture in 1 layer by non-absorbable suture
Suture in 2 layers by non-absorbable suture
Suture in 2 layers by absorbable sutures
Suture in layers by absorbable suture