Locking diagnosis method and device, equipment and storage medium

The invention discloses a locking diagnosis method, device and equipment and a storage medium. The method comprises the steps that a crankshaft signal and a camshaft signal are obtained; determining an initial crankshaft corner set corresponding to the camshaft based on the crankshaft signal and the camshaft signal; determining a first crankshaft corner set corresponding to a first time period and a second crankshaft corner set corresponding to a second time period based on the initial crankshaft corner set; and determining a locking diagnosis result based on the first crank angle set and the second crank angle set. By means of the method, on the basis that an additional sensor or actuator does not need to be added, by checking the rotation angle of the cam shaft and the rotation angle of the crankshaft in the stable operation process of an engine in the starting process, the fault is accurately located to the locking function failure of the VVT system, and the influences of the installation position of the c