It is of great significance to develop solar energy resources in China

which changes the national energy structure

optimizes the energy allocation

and improves the comprehensive utilization rate of energy. A new kind of parabolic trough solar collecting heat system is put forward on the basis of analyzing the combined solar energy and traditional energy. During the daytime with enough light intensity

cold-water is pumped into the parabolic trough solar concentrator heated to the rated temperature and provide heat for the collecting heat system. During the daytime with light deficiency

parabolic trough and electrical boiler works together to provide heat for the collecting heat system. During the night time or the daytime without light

electrical boiler is utilized to provide heat for the collecting heat system so as to achieve 24-hour-heating.