The utility model belongs to the technical field of dies and provides a female die collision prevention mechanism in a die. The mechanism comprises a female die part, a male die part, an ejection part and a protection part, wherein the female die part is correspondingly arranged above the male die part; the ejection part is arranged at the male die side and comprises a straight ejector rod, a straight ejector block which is fixed at the upper end of the straight ejector rod, an upper ejector pin plate and a lower ejector pin plate; the straight ejector block is contacted with the edge of a product; the straight ejector rod penetrates through the upper ejector pin plate to be fixed on the lower ejector pin plate; the protection part comprises a resetting rod and an elastic object which is arranged below the resetting rod; the protection part is arranged on the male die part and is positioned at the other side of the product opposite to the ejection part; and the resetting rod penetrates through the upper ejector pin plate to be contacted with the surface of the lower ejector pin plate. The mechanism disclosed by the utility model has the advantages that the straight ejector rod or an inclined ejector rod can be prevented from being damaged when collided with the female die in the production process, the service life of the die is prolonged, and the problems of fins and the like in long-term production are solved; and moreover, the mechanism is stable in structure and convenient to machine and assemble.