The present invention relates to the chemical processing equipment field, and discloses an impact-reducing uniform-flowing disc and a reactor. The impact-reducing uniform-flowing disc comprises a tower tray (100), a material falling pipe (200) penetrating through the tower tray (100), and an impact-reducing device (300) configured to buffer the kinetic energy of an obliquely falling material flow, wherein, the impact-reducing device (300) has a guide surface configured to guide the obliquely falling material flow to flow along the guide surface and fall to the tower tray (100), and overflow holes (201) are arranged at a portion of the material falling pipe (200) above the tower tray (100), and wherein, the impact-reducing uniform-flowing disc comprises a plurality of the material falling pipes (200) and a plurality of the impact-reducing devices (300) configured to provide a buffering falling material function for the plurality of material falling pipes (200). With the impact-reducing device, the kinetic energy of the material flow can be buffered, a falling material stream can be formed, and uneven material distribution incurred by any error of levelness of the tower tray can be avoided. In addition, the device provided in the present invention eliminates the impact force generated by residual kinetic energy, and avoids a \\"wave pushing\\" phenomenon.