Positioning and abutting mechanism, circuit board positioning and grabbing device and circuit board feeding system

The utility model relates to a locating and abutting mechanism, a circuit board locating and grabbing device and a circuit board feeding system, the locating and abutting mechanism comprises a locating pin, an abutting piece, a fixing piece, a first reset piece and a second reset piece, the abutting piece is connected with the fixing piece through the first reset piece, and the first reset piece has a trend to enable the abutting piece to be far away from the fixing piece; a first channel is formed in the abutting piece, at least part of the positioning pin is arranged in the first channel, the positioning pin is connected with the abutting piece through a second reset piece, and the second reset piece has the tendency to enable the positioning pin to move towards the outside of the first channel. According to the invention, while the circuit board is fixed by using the abutting piece and positioned by using the positioning pin, the abutting piece is connected with the first reset piece, and the positioning p