Sling tension testing device of elevator and sling tension testing method

Under the condition that slings are not arranged at the same plane and thus difference between the slings is different, or under the condition that slings are arranged in a zigzag shape, when the tension difference of a plurality of slings is tested, the testing device needs to be adjusted according to the distance among slings, and the testing requires a large amount of time. In order to solve the abovementioned problems, the present invention provides a sling tension testing device of the elevator. The sling tension testing device is provided with traction components clamped with the slings and used for tracting the sling towards a direction perpendicular to the length direction of the slings; a steel wire rope for connecting the two traction components at the tails, of one side opposite to the slings, of the traction components; and pulleys used for hanging the steel wire rope. The sling tension testing device pulls the pulleys towards a direction perpendicular to the sling length direction, so as to measure whether tension difference exists between two slings.