The nitrogen contents and nitrogen forms were studied in albic soil with long-term crop rotation and soybean, maize, wheat continuous cropping. The results indicated that under no fertilization condition, the decreasing range of total nitrogen, alkaline-hydrolyzable nitrogen were largest, but hydrolizable nitrogen, amino acid nitrogen, amino sugar nitrogen were least in the wheat continuous cropping plot. Under applying manure condition, the increasing range of total nitrogen, alkaline-hydrolyzable nitrogen were least in the wheat continuous cropping plot, but were largest in the maize continuous cropping plot. The increasing range of amino acid nitrogen and amino sugar nitrogen were largest in crop rotation plot, and the variation of the other nitrogen forms could not been found law in the two cultivations.