The invention relates to composite three-layer net cloth and a manufacturing method thereof. The composite three-layer net cloth consists of a surface layer, a bottom layer and a support layer, wherein the support layer is connected between the surface layer and the bottom layer, and the bottom layer and the polyester single-yarn support layer are weaved into a three-dimensional three-layer net cloth in a warp weaving way. The composite three-layer net cloth has the advantage that as the net cloth contains negative ion fiber, the main functions of negative ions are as follows: the lasting negative ion transmitting function is realized, so the air quality of the surrounding environment is adjusted; the biological wave transmitting function is stronger, so the blood circulation is promoted, the human body immune cells are activated, and the aging and premature senility of the human body are prevented; the lasting anti-bacteria and bacteria-killing functions are realized, so the bacteria with harmful effects on the human body can be killed, and the injury to the human body is avoided; the deodorizing property is excellent, so the foreign odor is removed, and a good living space is maintained; multiple trace elements required by the human body can be released, so the health of human body is favorably kept; the interface activity action is excellent, so the usage amount of a detergent is saved, and the environment is favorably purified; the requirements of concepts of health and environment protection are favorably met.