Abstract: A method and a system for acquiring CT equiangular data, a storage medium, and a CT scanning system are disclosed. The method comprises: acquiring offset errors of a rotor encoder of the CT scanning system; calculating compensation amounts for the rotor encoder based on the offset errors; applying each of the compensation amounts as a delay to a corresponding theoretical trigger signal of the data measurement system of the CT scanning system to generate a corrected trigger signal; and correcting data acquisition for a current view based on a trigger interval of a previous view of the CT scanning system. The disclosed method, system, storage medium, and CT scanning system achieve equiangular data acquisition of the CT scanning system through rotor encoder error compensation and rotor speed error compensation.