Connecting piece, frame and land leveler

The utility model discloses a connecting piece, a vehicle frame and a land leveler in the technical field of engineering machinery, and aims to solve the problems that in the prior art, during welding installation, the number of welding parts is large, welding seams are concentrated, stress concentration is prone to being generated, and the like. The connecting piece comprises a connecting piece body, and the connecting piece body comprises a left side plate, a right side plate, a lap joint plate and a rear plate which are integrally cast and formed. The two lap joint plates are correspondingly connected to the front portion of the left side plate and the front portion of the right side plate respectively. The rear plate is arranged at the rear part of the left/right side plate; the rear plate comprises a first rear connecting part which downwards extends out of the left/right side plate; and an assembly hole is formed in the first rear connecting part. The utility model is suitable for the installation of th