The utility model provides a lever mechanism of track traffic braking clamp, has a lever body, open at the middle part of lever body has the shaft hole, and the one end of lever body has a kicking block mechanism, kicking block mechanism has the kicking block body, the kicking block body has two coaxial connecting axles, have radial locating hole on the kicking block body, it has the mounting hole to open on the kicking block body, fixed plug is equipped with in the mounting hole, have the counter bore on the preceding terminal surface of fixed plug, be equipped with the briquetting in the counter bore, the other end of lever body has the cushion. Track traffic braking clamp is after using this lever mechanism, and the briquetting of kicking block mechanism can remain the maximum area contact throughout with the output shaft of checking cylinder, has effectively improved the efficiency of transmission brake force, after briquetting or cushion wearing and tearing, only need to change spare part, the maintenance cost is low, when breaking down, manual alleviating can be realized to the fixed plug that only needs to adjust in the kicking block mechanism, and be easy and simple to handle.