Die-casting die with deslagging and exhausting functions and die-casting method

The invention provides a die-casting die with deslagging and exhausting functions and a die-casting method. The die-casting die at least comprises a fixed die mechanism, a movable die mechanism and a deslagging and exhausting mechanism. The fixed mold mechanism comprises a fixed mold frame and a fixed mold core, the movable mold mechanism comprises a movable mold frame and a movable mold core, and the deslagging and exhausting mechanism comprises a deslagging assembly, a first slag cavity, a second slag cavity, a third slag cavity and an exhausting assembly; molten metal liquid enters the die, flows into the cavity to form a die casting, flows into the first slag cavity to form a first slag part, flows into the second slag cavity to form a second slag part, and flows into the third slag cavity to form a third slag part; the slag discharging assembly is matched with the second slag part and used for enabling the second slag part to be separated from the fixed mold mechanism. Due to the arrangement of the desla