The invention discloses a coal seam freezing type cross-drift coal uncovering method which comprises the following steps: a) arranging a drilling site in the position of a cross-drift operating surface of a tunnel being 5-7 meters away from a coal seam; b) drilling a plurality of cooling holes and temperature-sensing holes, which are matched with cooling pipes and temperature-sensing pipes of a stratum freezing system, in preset depth on the coal seam in the drilling site; c) arranging the stratum freezing system in the tunnel; d) respectively inserting the cooling pipes and temperature-sensing pipes of the stratum freezing system into the cooling holes and temperature-sensing holes; e) utilizing the stratum freezing system to cool the coal rock around the cross-drift to minus 30 DEG C to minus 20 DEG C and lasting for a period of time; f) opening the cross-drift and the coal rock in a blasting manner; and g) building arch for the tunnel. The method provided by the invention also comprises the steps of determining anti-bulge parameters, determining water content of the coal seam and moisturizing the coal seam. The method provided by the invention has the beneficial effects that the coal seam need not be slotted, the quantity of drilled holes is less, the construction period is short and the efficiency is high.