The invention provides a method for extracting parameters of a solar cell. The method comprises the following steps that 1) an ideal current voltage characteristic equation of a single-diode solar cell equivalent circuit is obtained according to the kirchhoff current law, and a solar cell single-diode model is established; 2) a semiconductor tester is used for measuring I-V curves of the solar cell, parameters of an open-circuit voltage Voc and a short circuit Isc can be obtained by combination of the I-V curves in the single-diode model, and then an unknown parameter of parallel resistance Rsh is extracted; 3) unknown parameters of series resistance Rs and an ideal factor n are determined by introducing temporary parameters of Rso and no through iterative calculation for multiple times; and 4) an unknown parameter of optical current Iph and a reverse saturation current I0 are obtained by substituting the obtained parameter values into formula deformation.