Solar energy is the most noticeable clean energy in new and renewable energy. It is conducive to energy conservation and environmental protection. It can be said that solar energy will be the mainstream of global energy in the future. Solar energy utilization technology is receiving more and more attention. Solar collector is the most important component of solar energy heat utilization, and its performance plays a decisive role in the success of the whole system. Solar collectors can be divided into many types according to their different properties. This paper mainly compares heat transfer efficiency between heat pipe solar collectors and flat plate collectors, so that you can make a better decision on choosing and purchasing heat pipe solar collectors.