An elastic pin connector for automatic switching of a jig is a device capable of safely, stably and reliably transmitting confirmation signals during the automatic process of a robot taking out products and taking other actions. The elastic pin on a male contact is embedded into an insulating casing and is mounted on a tray on the side of the jig, the flat pin on a female contact is embedded into an insulating casing and is arranged on a tray of the side of a taking-out machine, and the elastic pin and the flat pin are provided on the back sides thereof with stopping screws respectively. An inductor signal wire on the jig plate is inserted into a male contact hole and is locked through the stopping screw on the back side; and an input port wire of the taking-out machine is connected with the female contact. When the jig plate is assembled on the taking-out machine, the male contact and the female contact approach each other under the action of an external force, the elastic pin of the male contact and the flat pin of the female contact correspondingly contact, and the elastic pin is compressed under pressure force, so as to form a circuit to transmit confirmation signals. Compared with the prior art, the elastic pin connector provided by the utility model adopts a screw forced fit structure on the back side thereof, and has the advantages of simple structure, stable and reliable electric signal transmission, long service life, convenient connection and replacement, and good convenience and practicability.