Welding frame for circuit board

The invention discloses a welding frame for a circuit board, and relates to the technical field of welding equipment. Comprising a base and supporting structures; a supporting structure is installed on the base and comprises a supporting box, a pressure equalizing cavity and an isolation cavity are formed in the supporting box, multiple sets of through holes which are located in the two faces of the isolation cavity and are in one-to-one correspondence in position are formed in the supporting box, supporting rods inserted into the pressure equalizing cavity are slidably installed in the through holes, and hydraulic oil is arranged in the pressure equalizing cavity; one side of the supporting box is connected with a one-way valve which is connected with an air pump structure. The device is used for placing and fixing the circuit board and providing welding assistance during welding, can be well attached to various components installed on the circuit board, provides stable support, avoids the situation that par