The invention discloses an automatic focusing structure for solar heat power generation and a clustered power generation device, wherein the automatic focusing structure for solar heat power generation at least comprises a heat engine assembly, a heat focusing assembly, a first power assembly and a solar tracking unit; the heat engine assembly is of a fixed type and used for absorbing solar heat to do work; the heat focusing assembly comprises a heat focusing lens and a frame body, wherein the heat focusing lens is fixed on the frame body and has a focus on the heat engine assembly; and the solar tracking unit is used for controlling the output power of the first power assembly according to the moving track of the sun and further controlling the frame body to do an arc-shaped movement so that the heat focusing lens is always over against the sun, meanwhile, a plurality of automatic focusing structures for solar heat power generation form an arrayed arrangement to generate a great dealof generated energy and form the clustered power generation device.