Abstract: As the cryogenic electrical motor is the key component of the submerged liquid natural gas（LNG） pump, this paper summarized the development of cryogenic electrical motors to promote the research of the cryogenic electrical motor for the LNG pump. All kinds of the existing cryogenic electrical motors was presented and analyzed in this paper. And the key technologies and status were summarized so that the technical problems of the cryogenic electrical motor for the LNG pump were proposed. Based on the selection principle of the cryogenic electrical motor for the LNG pump, cryogenic induction motors and cryogenic permanent magnet synchronous motors are suitable for the LNG pump. And the cryogenic induction motor is more suitable for the LNG pump at the exploratory stage. With the developing of the cryogenic induction motor, the cryogenic permanent magnet synchronous motor can be developed further. The work lays the foundation for the development of the cryogenic electrical motor for the LNG pump.