The invention discloses a trough type solar energy, coal economizer and high pressure evaporator integrated complementary combined cycle system which belongs to the technical field of solar thermal power generation. A system integrating a first trough type solar heat collection mirror field and a high pressure evaporator passing through a gas power generation system and a waste heat boiler is taken as a base system; and on the basis of the base system, by changing an integration position and an integration mode of a solar heat collection mirror field in the system, a new solar complementary combined cycle system is integrated through high, middle and low feed pumps, high, middle and low pressure steam drums and a traditional heat complementary combined cycle system. The novel integration scheme integrating a part of solar energy with a low pressure coal economizer and a high pressure evaporator correspondingly is provided, by replacing a heat load of the low pressure coal economizer, the limitation of a too low exhaust gas temperature can be alleviated, and the waste of solar resources is avoided, so that the mass flow rate of high pressure feed water evaporated in a solar heat collection heat exchanger is increased, and the quantity of solar heat absorbed by the waste heat boiler and the solar power generation quantity are further increased.