The invention discloses a concrete photovoltaic roof support system. The concrete photovoltaic roof support system comprises a base, photovoltaic supports, photovoltaic modules, cement balancing weights, tapping screws and connection pieces, wherein the photovoltaic supports are fixedly arranged on the base by the tapping screws, two ends of the photovoltaic modules are connected and fixed with the photovoltaic supports via the connection pieces, acute angles are formed between the photovoltaic modules and the base in a horizontal direction, the cement balancing weights are arranged on a firstphotovoltaic support and a third photovoltaic support, and wind shielding plates are arranged on a second photovoltaic support and the third photovoltaic support. By connection of the photovoltaic supports and the photovoltaic modules in a matching way, the construction process is simplified, the construction cost is reduced, and the construction progress is accelerated; by employing high-strength plastic to substitute traditional metal, the production cost is greatly reduced, the weight of the whole support system is reduced, and the concrete photovoltaic roof support system is convenient toinstall and transport; the concrete balancing weights are utilized by calculating a load, the influence of air pressure of back air is reduced, and the roof bearing strain is reduced; and the wind shielding plates are arranged by tail parts of the modules, and the wind resistant performance of the support is improved.