The invention provides a hot braising method for phosphorus removed slag and carbon removed slag. The method comprises the following steps of: pouring hot phosphorus removed slag into a slag braising pit to parch the slag braising pit; pouring the phosphorus removed slag or the carbon removed slag into multiple parched slag braising pits respectively, turning over, dewatering and breaking the slag in each slag braising pit, then pouring another slag respectively, and repeating the operations of turning over, dewatering and breaking the slag till each slag braising pit is full of the slag; and covering the slag braising pits full of the slag with slag braising covers, and braising the slag in a three-section dewatering and braising mode. The hot braising method for the phosphorus removed slag and the carbon removed slag is simple and feasible, can reduce the potential safety hazard of blasting of the slag braising pits and effectively improve the slag braising efficiency and slag braising quality, and has remarkable economic benefits.