The invention relates to a construction method for a support structure of a coal tower template for a tamping type coke oven, which comprises the following steps of 1, treating a base of a steel structure supporting platform; 2, manufacturing and installing the steel structure supporting platform; 3, prepressing the steel structure supporting platform: the prepressing materials are a resistance wall for the coke oven and a precast slab for a basement, the steel structure supporting platform is overloaded and prepressed according to 110% design load, an observing point is arranged, and the prepressing time is seven days, and the observation is carried out once a day; 4, installing each falsework of the template; and 5, removing the falsework and the steel structure supporting platform. Theconstruction method can realize effective monitoring by well design of a large-span, high-support and heavy-load template support system, particularly is the first in the country in coal towers with a span of 34.045 meters but the beam does not have cracks, solves the difficult problem of construction of a large-span, high-support and heavy-load structure, adapts to the coking technique to be developed in large size and tamping type coke ovens, and has the advantages of short construction period, revolving material saving, safety, reliability, easy quality control and high concrete strength.