The invention discloses an integrated motor starting and protecting device with an improved structure, and belongs to the technical field of single-phase alternating current motor starting and protecting devices. The device comprises a shell, a shell cover, an overload protector module, a power consumption-free starter module and an external terminal mechanism, wherein the shell is provided with an overload protector module cavity, a power consumption-free starter module cavity, an external terminal mechanism cavity and a starting controller cavity. The device is characterized in that: the external terminal mechanism cavity comprises a first insert cavity, a second insert cavity, a third insert cavity and a fourth insert cavity; the first, second and third insert cavities are positioned on the same side of the shell; the external terminal mechanism comprises a first insert, a second insert, a third insert and a fourth insert; the first insert is inserted into the first insert cavity; the second insert is inserted into the second insert cavity; the third insert is inserted into the third insert cavity; and the fourth insert is inserted into the fourth insert cavity. The device has the advantages of reducing the material consumption of the external terminal mechanism, meeting industrial production requirements and reflecting resource saving, along with compact structure, convenience for assembly and high assembly efficiency.