Waist support supporting device and automobile seat

The utility model provides a waist support supporting device and an automobile seat, and the waist support supporting device comprises a supporting assembly which comprises a back spring, and a first skeleton and a second skeleton which are arranged along a first direction; the back spring is mounted between the first framework and the second framework; the back spring has a first end and a second end; the upper part of the first end and the upper part of the second end are rotatably connected with the first framework and the second framework around a first axis respectively; the first axis is parallel to the first direction; the driving assembly comprises a driver body, a first stay wire and a second stay wire; the driver body is mounted on the first framework; one end of the first stay wire is connected with the driver body, and the other end is connected with the lower part of the first end after bypassing the front of the first framework; one end of the second stay wire is connected with the driver body,