The invention discloses a hyperspectral compressed sensing method, device and system based on a modified linear hybrid model. The method comprises the steps: S1, acquiring observation data Y = AX after spectral dimension compression sampling of an original hyperspectral image are acquired, wherein A is an observation matrix, and X is the original hyperspectral image to be reconstructed; s2, constructing a modified linear hybrid model: X = ES + BEH, wherein E is an end member matrix, S is an abundance matrix, B is a correction matrix of the end member E, H is an abundance matrix corresponding to the corrected end member; respectively estimating optimal values of B, S and H based on the observation data Y; and S3, substituting the estimated values of B, S and H into the modified linear hybrid model to reconstruct an original hyperspectral image. A correction item BEH is introduced into the correction linear hybrid model, self-adaptive correction can be carried out according to the disturbance condition of each point on the spectrum, the hyperspectral image characterization capability of the model is improved, and the reconstruction quality of hyperspectral compressed sensing is further improved.