The invention belongs to the field of artware processing, aims at solving the technical problems of an abalone shell in the processing process at present and provides a preparation method of an ornamental type abalone shell. The preparation method comprises the following steps of acid pickling, impurity removal, colour fixation, soaking with alkali, brushing and colour protection. The preparationmethod can keep the original colour and texture of the abalone shell and has very good ornamental and collection values.