The invention discloses an elastic cooling and pressing fixture for a PCB. The elastic cooling and pressing fixture for the PCB comprises a support and is characterized by further comprising a cylinder, a movably plate, a plurality of springs, a pressing plate, a cooling pipe and a flexible pipe, wherein the support comprises a base, a supporting beam and a top plate, the supporting beam is arranged on the top of the base, the top plate is arranged on the top of the supporting beam, the cylinder is arranged on the bottom of the top plate, a cylinder rod of the cylinder is connected with the movably plate, the springs are arranged on the bottom of the movable plate, the pressing plate is arranged on the bottoms of the springs, the cooling pipe penetrates through the pressing plate, a water inlet and a water outlet of the cooling pipe are connected through the flexible pipe, the flexible pipe is cooled through a condenser, and an openable hole used for water injection is formed in the cooling pipe. The elastic cooling and pressing fixture for the PCB has the advantages that the structure is simple, the pre-pressing force is balanced, the pressing effect is good, the precision of pressing positions is high, the cooling speed is high, and the machining efficiency and the machining quality can be improved greatly.