The invention provides a solar air heat collector which comprises a heat absorbing plate, a heat preservation shell and a transparent cover plate, wherein an air chamber is formed by the transparent cover plate and the heat preservation shell; the heat absorbing plate is arranged in the air chamber and divides the air chamber into an upper air chamber and a lower air chamber; an air inlet and an air outlet are formed in the heat preservation shell; the air inlet is communicated with the upper air chamber and the lower air chamber; the air outlet is communicated with the upper air chamber and the lower air chamber; the heat absorbing plate is a sine-wave-shaped heat absorbing sheet; and swelled bubbles and concave pits are distributed on the heat absorbing plate. By virtue of the sine-wave-shaped heat absorbing plate, not only is the heat absorption area enlarged, but also reflection and absorption of multiple times can be generated; and boundary layers in air flow are damaged by the swelled bubbles and the concave pits added to the heat absorbing plate, so that a convective heat transfer coefficient of the heat absorbing plate and air is increased, and the heat property of the solar air heat collector is improved to the maximum extent by virtue of the combination of the swelled bubbles and the concave pits.