The utility model discloses a deadweight-type photovoltaic support frame. The support frame comprises guide rails for laying a photovoltaic module, and support devices for supporting the guide rails. A plurality of support devices are arranged parallelly, and a plurality of guide rails are arranged on the support devices. The support device includes a cant beam, a front column, a rear column, a ground beam and a buttress. The front column and the rear column are vertically arranged on the ground beam, and the vertical height of the front column relative to the ground beam is larger than that of the rear column relative to the ground beam. The cant beam is tilted on the tops of the front column and the real column. The joint of the ground beam and the rear column extends outwardly in the horizontal direction, forming a fixing section. The buttress overlaps and presses the fixing section. According to the utility model, the deadweight of the buttress is fully used to resist the overturn caused by wind, so that the deadweight-type photovoltaic support frame can support the photovoltaic module safely and reliably with light deadweight.