The invention discloses a circuit board welding device convenient to use. The circuit board welding device convenient to use comprises a platform face, a welding mechanism and a frame. The frame comprises upright rods which are symmetric front and back and a transverse beam fixed between the tops of the upright rods. The platform face is arranged between the bottoms of the upright rods under the transverse beam. The bottom face of the transverse beam is internally provided with a first sliding groove which extends front and back. The first sliding groove is internally provided with a first screw which extends front and back. The first screw is connected with a first sliding block in a cooperated manner. The bottom of the first sliding block is fixedly connected with the top end of the welding mechanism. The welding mechanism is internally provided with a transmission cavity, the bottom of the transmission cavity is provided with a through cavity in a communicating manner, and the rearside wall of the welding mechanism is provided with a rotating disk. The circuit board welding device convenient to use is simple in structure, reasonable in design, low in manufacturing cost and maintaining cost, capable of achieving multidirectional adjustment of welding positions, convenient to operate, capable of achieving automatic extensible and retractable welding, high in safety and capable of achieving automatic clamping and fixing of workpieces, and the welding stability is improved.