The invention provides a polishing pad trimming device and trimming equipment, and belongs to the technical field of chemical polishing equipment. The polishing pad trimming device comprises a rotation base, a rotation shaft and a shell assembly. The rotation base and the end portion of the rotation shaft are connected. The shell assembly is rotationally connected with the rotation shaft through a bearing assembly. Through changing of the mass of the shell assembly, the downward pressure of the polishing pad trimming device is adjusted, and accordingly the surface of the polishing pad can be trimmed. The polishing pad trimming device and the trimming equipment have the beneficial effects that the structure is simple, the control difficulty is low, the downward pressure is adjustable, and maintaining and repairing are simple and convenient; and a polishing pad can be trimmed without the manner of additional arrangement of other power sources. The trimming equipment comprises a guiding device, a connecting rod and the above polishing pad trimmer. The guiding device plays a guiding role on the movement direction of the polishing pad trimmer so that an operator can conveniently and accurately adjust the movement position of the polishing pad trimmer on the polishing pad, and accordingly the surface of the polishing pad is trimmed.