The invention discloses a mechanical emergency star-delta starter, which comprises a handle, a rotating rod, a box body assembly, a drive assembly I and a drive assembly II, wherein the handle is connected with the rotating rod; the rotating rod passes through the lower end of the box body assembly and is connected with the drive assembly I; the drive assembly II is connected with the drive assembly I; the box body assembly comprises a bottom plate, a side box and a top plate; the side box is connected with the bottom plate; the top plate is connected with the upper end of the side box; the drive assembly I comprises a rotating block, a bolt, a bracket, a lifting platform, a spring I and a press sheet; and the drive assembly II comprises a tightening sleeve, a tightening shaft, a worm, a duplicate gear, a rack, a push rod, a spring II, a gear bracket and a cover plate. According to the mechanical emergency star-delta starter, mechanical emergency starting of a fire pump is achieved, normal operation of a fire fighting system is ensured, people is provided with a guarantee for self-rescue in the first time and the life and property losses of people are reduced.