Clamping and positioning device and laser resistor trimming machine

The utility model provides a clamping and positioning device and a laser resistor trimming machine. The clamping and positioning device comprises a clamping body, a limiting mechanism, an adsorption mechanism and a rotating mechanism. And the clamping and positioning device can be used for clamping, fixing and adjusting the position of the material sheet. Specifically, a material sheet is clamped through the limiting mechanism, the material sheet is fixedly adsorbed through the adsorption mechanism, and the clamping main body is driven by the rotating mechanism to rotate around the central shaft by a specified angle, so that the position adjustment of the material sheet is realized. According to the resistance trimming machine, the rotating mechanism adjusts the position of the material sheet, and it is guaranteed that when the resistance trimming machine conducts laser machining, laser can effectively act on the material sheet. According to the laser resistor trimming machine, the clamping and positioning de