The invention relates to a glass water slip testing device and a testing method thereof. The glass water slip testing device is characterized by comprising a servo driving motor (1), a glass fixing plate (3) and a clamping mechanism, wherein one end of the glass fixing plate (3) is fixedly connected with an output shaft of the servo driving motor (1), the clamping mechanism can fix glass (5) to be tested on the glass fixing plate (3), a connector is arranged at one end of the glass fixing plate (3), a connecting hole is formed in the connector, the connector is connected with the output shaft of the servo driving motor (1) through the connecting hole, the connecting hole is arranged at one end closed to the glass fixing plate (3) of the connector, a solid portion of the other end of the connector is used for balancing the weight of the glass fixing plate (3), and the clamping mechanism are two spring clips (2) which are symmetrically arranged. The glass water slip testing device disclosed by the invention has a simple structure, low cost and strong practicability and can reduce rework and defective product waste.