Existing bistatic Synthetic Aperture Radar(BiSAR) imaging methods simplify all targets in the scene as the superposition of point targets, ignoring the complex scattering processes of the targets. This leads to model mismatch in the imaging echoes and the loss of structural information of the targets in the imaging results. To address this issue, a BiSAR target parametric imaging method based on target scattering feature parameter estimation is proposed. Firstly, a BiSAR parametric echo model is established based on the ideal point scattering model and three typical target scattering models. Secondly, the position parameters are estimated using the coarse imaging results, and a local dictionary matrix is constructed based on the parametric echo model to achieve dictionary dimensionality reduction. Then, the Alternating Direction Method of Multipliers(ADMM) is utilized to estimate the target scattering feature parameters. Finally, the image is parametrically reconstructed based on the estimated target parameters. Experiments with simulated data validate the accuracy and effectiveness of the proposed method, which can enhance the structural information of the targets in the imaging results.