The invention relates to the field of middle voltage switches and particularly relates to a motor speed change mechanism assembly and a middle voltage switch using the same. The motor speed change mechanism assembly comprises a motor and a speed change mechanism. The motor comprises a motor shaft. The speed change mechanism comprises a first output shaft for outputting continuous motions and a second output shaft for outputting intermitted motions. The first output shaft is in transmission connection with the motor shaft. An intermitted transmission mechanism is arranged between the second output shaft and the first output shaft. The motor speed change mechanism assembly achieves double-shaft output of the motor; the first output shaft and the second output shaft have a transmission relation therebetween, periodic stop and continuous motions can be conducted at the same time, usage requirements for specific occasions can be met, and the number of rotation turns of continuously-moving output shafts can be calculated; and the structure is simple, the positioning is reliable, and the transmission is stable.