The invention relates to a circuit board turn-clamping mounted type LED lamp, comprising a clamping plate disposed above a bottom plate. The bottom plate is provided with a guide pipe, a rotational adjusting pipe is nested in the guide pipe and is in threaded connection with the guide pipe, the clamping plate is provided with a rotating disc, the clamping plate is provided with a positioning post, a sleeve is arranged at the center of the rotating disc, the sleeve sleeves the outer periphery of the positioning post, the outer periphery of the rotating disc is provided with a plurality of LEDs, the edge of the rotating disc is provided with a circular thin-film circuit board, the LEDs are electrically connected with the thin-film circuit board, the clamping plate is provided with a solar battery module, the clamping plate is provided with a carrier plate, and the solar battery module is disposed on the carrier plate; the solar battery module is connected with the thin-film circuit board through an electric wire. A user may control and rotate the adjusting pipe to finish horizontal rotational adjustment along the guide pipe through an operating rod, thus facilitating the horizontal rotational adjustment of the clamping plate and providing more flexible adjustment.