A pedal system for a percussion instrument includes a support element. The support element includes a pedal, at least one upright frame, a positioning unit and a rotatable axle. A connecting shank and a connecting body are disposed on the axle. A transmission element connects the pedal with the connecting shank. A resilient member has a first end and a second end. The first end of the resilient member is adjustably connected to the connecting body, and the second end of the resilient member is adjustably connected to the positioning unit. As such, the position of the resilient member is adjustable to provide different resilient force, modifying the pedal feedback.