The basis of choosing shot blasting process parameters in Dalian shot blasting processing is: the purpose of shot blasting cleaning; Surface hardness and surface condition of shot blasted workpiece; Quality requirements for shot blasting; Surface indentation coverage; Steel shot diameter; Steel shot throwing speed; Moving speed of workpiece relative to shot blasting; Workpiece loading capacity; Shot blasting time, etc. Among them, only the purpose of shot blasting, the surface hardness of shot blasted workpiece, the quality requirements of shot blasting, the loading capacity of workpiece and shot blasting time are variable conditions. In practice, only the workpiece loading and shot blasting time can be set.