The invention relates to the technical field of molten steel sampling, in particular to a pail sample sampling method. The method includes the steps that sampling operation is conducted on molten steel through a pail sampler, and a pail sample is obtained; the pail sample stands on a package edge after being lifted out of the molten steel; cooling with a die is conducted on the standing pail sample through a cooling water groove; demolding operation is conducted on the pail sample generated after cooling with the die is conducted; the pail sample generated after demolding is conducted is cooled through the cooling water groove. According to the pail sample sampling method, the pail sample stands on the package edge after being lifted out of the molten steel, so that an external blank shell of the pail sample is effectively solidified, the pail sample can be evenly filled with the molten steel, an internal shrinkage cavity or the uneven sample surface generated due to the fact that the pail sample is lifted in the liquid state is avoided, the uniformity of the pail sample is guaranteed, and the pail sample is made to be representative.