The invention discloses a solar greenhouse for flowering plants in winter in high and cold areas. The solar greenhouse for flowering plants in winter in high and cold areas comprises a cold-proof layer, a front wall, a lighting roof, a peak, a rear roof, a rear brick wall, polystyrene boards, an air vent, a biomass reverse-burning multi-pass low-carbon energy-saving water boiler, a cotton quilt, an electric roller shutter machine, and a sun-shading net rack. Lighting angles of roof positions 0.5m-1.5m, 1.5m-2.5m, 2.5m-3.5m, 3.5m-4.5m, 4.5m-5.5m, 5.5m-6.5m and 6.5m-7.5m away from the front wall inside greenhouse are 53DEG-57DEG, 48DEG-52DEG, 43DEG-47DEG, 38DEG-42DEG, 33DEG-37DEG, 28DEG-32DEG, and 23DEG-27DEG respectively. A vertical line of the peak is 0.5-1.5m away from the inner side of the rear brick wall. The peak is 4.4-4.6m off the indoor floor. The polystyrene boards are disposed in the middle of the rear brick wall. The top of the rear wall has an inner elevation of 63DEG-67DEG apart from the roof. The biomass reverse-burning multi-pass low-carbon energy-saving water boiler is disposed in the greenhouse.