Brazing clamp for heat exchanger

The brazing clamp for the heat exchanger comprises a lower clamping plate and an upper clamping plate, two guide columns distributed in the left-right direction are fixedly arranged on the upper end face of the lower clamping plate, and each guide column comprises a first column body, a second column body, a third column body and a fourth column body which are integrally arranged from bottom to top; the upper clamping plate comprises a top plate, two guide sleeves, a locking piece and an elastic pressing head, two first penetrating holes allowing the fourth column bodies to penetrate through are formed in the top plate, the two guide sleeves correspond to the two second column bodies in a one-to-one mode, the guide sleeves are arranged outside the corresponding second column bodies in a sleeving mode, and the upper ends of the guide sleeves are fixedly connected with the lower end face of the top plate; the locking piece is clamped between the upper end face of the top plate and the lower end face of the four