The invention provides a cold region paddy seedling culture matrix and relates to a paddy seedling culture matrix, and the cold region paddy seedling culture matrix is used for solving the problems of slow seedling emergence of the earlier stage, more irrigation times, serious damping off during the mid-to-late stage of seedling growing and obvious fertilizer removal during the later stage of the seedling when the existing paddy seedling culture matrix is applied in paddy cultivating areas of cold regions. The cold region paddy seedling culture matrix is prepared from edible fungus residues, coal ash, grass carbon, vermiculite and perlite, or ground straw, the coal ash, the grass carbon, the vermiculite and the perlite. The paddy which uses the cold region paddy seedling culture matrix does not need disease preventing and weeding during the seedling culture period, only needs to be irrigated, is convenient to operate, time-saving and labor-saving, has high quality seedlings and stronger stress resistance, no damping off, bacterial wilt and other diseases are caused during the seedling stage, and the seedlings are short and strong, have wide leaves and bright green color. The cold region paddy seedling culture matrix is applied in the paddy field.