The invention relates to the technical field of vibration mechanical engineering, and discloses a single-vibration-body vibration system and a synchronous characteristic analysis method. A first motorand a second motor are arranged on the vibrating body. The first motor and the second motor are arranged in the horizontal direction and symmetrical about the vibrating body. The first motor is connected with one end of the first swing arm. The other end of the first swing arm is connected with the first mass ball. The second motor is connected with one end of the second swing arm, the other endof the second swing arm is connected with the second mass ball, and the first mass ball and the second mass ball rotate reversely. The invention provides a single-vibrator vibration system and a synchronous characteristic analysis method. The novel design thought is adopted that a traditional reciprocating motion device is large in power transmission route and energy loss is great. A novel reciprocating motion mechanical structure is designed through the vibration synchronization theory, mechanical transmission parts are reduced, large centrifugal driving force is generated, the system energyloss is small, and a new design thought is provided for a vibration system.