This study investigates methods for suppressing dynamic aiming errors, addressing the issue of dynamic goniometer accuracy being easily affected by light intensity stability during aiming. A Gaussian spotlight intensity distribution model is established, and the mechanism of dynamic aiming error generation is analyzed. The principle of the suppression method based on the lateral photovoltaic effect is demonstrated. A dynamic aiming system is constructed, and experiments are conducted to validate the aiming repeatability and accuracy of the proposed method. The results show that the aiming repeatability is 0.19″, and the aiming accuracy is 0.15″. Compared to the light intensity threshold aiming method, the aiming error is reduced by 66%. Dynamic measurement experiments with angle blocks are conducted, applying the proposed method to the dynamic goniometer system. The results demonstrate that the system accuracy meets the calibration requirements for the grade 1 angle block gauge.