The invention provides a platy solar thermal collector. The solar thermal collector comprises a plurality of thermal collecting pipes which are arranged side by side and thermal collecting plates. The adjacent thermal collecting pipes are connected through the thermal collecting plates. The solar thermal collector further comprises a solar cell panel. The solar cell panel is disposed at the tops of the thermal collecting pipes and connected with the tops of the thermal collecting pipes through heat-conducting glue. The solar thermal collector provided by the invention is of a novel structure, the double functions of thermal collecting and power generation can be achieved, and demands of various aspects are met.