Piston guide of high-pressure pump

The utility model relates to a piston guide piece of a high-pressure pump. The piston guide piece comprises an upper main body and a lower main body, a connection part for integrally connecting the upper body and the lower body; and a sealing member surrounding the connecting portion and provided between the upper body and the lower body by insert injection molding. A gap exists between the upper body and the lower body and the piston, and the sealing piece is tightly attached to the piston. Accordingly, it is possible to prevent fuel leakage while ensuring the movement performance of the piston. 本实用新型涉及高压泵的活塞导件，包括：上部主体和下部主体；连接部，使上部主体与下部主体连接成一体；密封件，包围连接部，通过嵌入注塑成型设置于上部主体与下部主体之间。在上部主体及下部主体与活塞之间存在间隙，密封件紧贴于活塞。因此，可在确保活塞的运动性能的同时防止燃料泄漏。