A mobile phone with a stepless motion function is provided and includes a mobile phone body, an upper cover which can be movably provided outside the mobile phone body, and a pushing device including a first end part and a second end part, wherein the first end part is fixedly provided at the upper cover, and the second end part is fixedly provided at the mobile phone body, whereby the upper cover can move at a constant velocity from a first position to a second position relatively to the mobile phone body. Therefore, the mobile phone with a stepless motion function of the invention enables the upper cover to move at a constant velocity at the mobile phone body to increase the tactile sensation of the mobile phone.