The invention relates to a turbulence agglomeration chamber and a method for removing ultrafine particles applying the same. The turbulence agglomeration chamber is characterized in that the agglomeration chamber is of a symmetrical hexagonal structure taking an incoming flow flue gas as the axis, an inlet is in a sudden-expansion state, an outlet is in a contracting state, the ratio of the width of the inlet to the total width of the agglomeration chamber is 0.2 to 0.4, the inclined angle of the wall face of the inlet and a center line of the incoming flow flue gas is 30 degrees to 60 degrees, the agglomeration chamber is internally provided with a triangular prism pin fin and 2n vortex sheets, n is larger than or equal to 1, every two vortex sheets form a group and are arranged symmetrically by taking the incoming flow flue gas as the axis, the inclined angle of each vortex sheet and the center line of the incoming flow flue gas is 30 degrees to 60 degrees, and the shortest distance between the vortex sheets and the wall face of the agglomeration chamber is 1/6 to 1/4 of the total width of the agglomeration chamber; the front view shape of the triangular prism pin fin is an isosceles triangle, the bottom edge of the isosceles triangle is perpendicular to the center line of the incoming flow flue gas, the vertex angle of the isosceles triangle directly faces the inlet and is located on the center line of the incoming flow flue gas, and the distance between the center of the isosceles triangle and the inlet is 1/4 to 1/3 of the total length of the agglomeration chamber.