The invention discloses a system for installing solar cell panels. The system comprises two cross beams, a plurality of clamping parts installed on the cross beams and a plurality of blocks installed at the two ends of the clamping parts, wherein two symmetrical clamping slots are axially arranged at the two sides of each clamping part; installing slots are axially arranged at the bottoms of the clamping parts; the bottoms of the clamping parts are borne and fixed on the cross beams; cell panels are clamped in the clamping slots of the adjacent clamping parts; the blocks are fixedly connectedat the two ends of the clamping parts and are used for positioning the cell panels; a plurality of cell panels and a plurality of clamping parts are installed circularly to form a bigger solar cell panel; the positions of the clamping parts are adjusted according to the cell panels so that the clamping parts and the cell panels are clamped, without designing the clamping parts in advance or installing all the cell panels by one step, so the cell panels are installed rapidly; and at the same time, the supports for installing the cell panels have simple structure and light weight, thus greatly improving the installing speed during outdoor installation and saving the installation and use costs.