The invention relates to a chrysanthemum field casing pot cultivation method and belongs to the field of flower cultivation. The chrysanthemum field casing pot cultivation method specifically comprises the steps that 1, vigorous seedlings are selected, and the vigorous seedlings are planted in a field and then are sleeved with field cultivation casing pots, wherein each field cultivating casting pot comprises a pot body and a combined water guide pipe, a flower casing hole is formed in the bottom of each pot body, each combined water guide pipe is composed of a straight guide pipe body, a connecting elbow and a horizontal guide pipe, each straight guide pipe body is arranged in the corresponding pot body, each horizontal guide pipe body is arranged outside the corresponding pot body, and each straight guide pipe body and the corresponding horizontal guide pipe body are connected through the corresponding connecting elbow penetrating through the flower casing hole; 2, when stems of chrysanthemums grow to be 15-20 cm long, growing points are removed, the chrysanthemums are made to grow out lateral branches, according to the growth condition of the chrysanthemums, the lateral branches are removed or 2-5 lateral branches are maintained for each chrysanthemum, and when the lateral branches grow to be 5-7 cm long, growing points of the lateral branches are removed; according to the growth condition of the chrysanthemums, after the stems and the lateral branches are shaped, top application is conducted, and the chrysanthemums are irrigated with water containing nutrients. By the adoption of the chrysanthemum field casing pot cultivation method, the attractiveness of the chrysanthemums can be effectively improved, the problem that water plugging is caused in a field cultivation casing pot is effectively solved, and the economic benefits of chrysanthemum production are increased.