The invention relates to a tissue culture method for heuchera micrantha 'Palace Purple'. The method comprises the following steps of: obtaining sterile materials; differentiating and proliferating buds; culturing strong seedlings of adventitious buds; rooting; and hardening off seedlings and transplanting the seedlings and the like. Compared with the prior art, the method greatly improves the reproductive speed of the heuchera micrantha 'Palace Purple' and the trimming of the seedlings, and improves the stability of shape and properties of the heuchera micrantha 'Palace Purple', so that the industrial mass production of the seedlings can be realized.