The invention discloses an
assembly device for
welding a circuit board and a heat sinking base plate and a
welding method of the
assembly device, relating to the emitting and manufacturing technical field of a radio and a television. The
assembly device comprises clamping board
layers consisting of a bottom board, a middle board and a top board which are horizontally arranged in sequence, and a clamping rod which is arranged on the centers of the clamping plate
layers and penetrates through the three
layers of the clamping plates, wherein a clamp
handle capable of clamping or loosening the three layers of the clamping plates is arranged on the top end of the clamping rod; and bolts for fixing the three layers of the clamping plates are respectively arranged on four corners of the clamping plate layers. A
welding piece consisting of a power
amplifier module circuit board and the heat sinking base plate can be arranged on the bottom board; a plurality of pressing columns with pressure spring devices are fixedly connected below the middle board vertically; and a position of each pressing column is in one-to-one correspondence with the power
amplifier module circuit board and a pressing hole on the heat sinking base plate respectively. Compared with the prior art, the assembly device can effectively ensure the power
amplifier module circuit board to reliably connect with the heat sinking base plate for a long time, so as to achieve good electrical
conductivity and
thermal conductivity, and improve working stability and reliability of an amplifier.