Solar greenhouse with circular-arch-shaped front daylighting roof

The utility model belongs to a solar greenhouse with a circular-arch-shaped front daylighting roof. The solar greenhouse is composed of the front daylighting roof, a rear slope roof face, gables on the two sides and a rear eave wall. The front daylighting roof is composed of arch bars arranged in parallel and daylighting fabric, wherein the arch bars are paved with the daylighting fabric. The front daylighting roof is a circular-arch-shaped roof stretching from a rooftop to the ground in front. The solar greenhouse is characterized in that the angle of elevation alpha of the front daylighting roof ranges from 35 degrees to 50 degrees; the angle of elevation beta of the rear slope roof face ranges from 16.5 degrees to 31.5 degrees; the result obtained by dividing the bending radius of each arch bar of the front daylighting roof by the chord length of each arch bar ranges from 0.8 to 1.2. The solar ray incidence rate of the front daylighting roof is high in winter, temperature rise in the solar greenhouse in winter is facilitated, and the thermal insulation performance at night is good; solar energy collected in the daytime in summer is small, and temperature drop in the greenhouse is utilized.