The invention relates to a planting method for organic purple cabbages. The planting method comprises the following steps that an organic planting substrate is prepared; the prepared organic plantingsubstrate is accommodated in a planting bag; purple cabbage seedlings are planted in the organic planting substrate, and openings used for the purple cabbage seedlings to pass through are formed in the upper portion of the planting bag; the purple seedlings are watered to keep humidity of the organic planting substrate and cultivated continuously until the purple cabbages are ripe. The operation is simple, it is not necessary to spray insecticide of weeding and killing insects, the green and nuisanceless organic purple cabbages can be planted, and the cost is lower.