Waterproof assembly suitable for gearbox and waterproof sawing machine

The utility model discloses a waterproof assembly suitable for a gearbox and a waterproof sawing machine. The waterproof assembly comprises an output end cover arranged at the front end of a gearbox set and a water baffle arranged at the front end of the output end cover. Output shaft fixing holes through which an output shaft of the gear box group can pass are formed in the center positions of the output end cover and the water baffle; a drainage groove which has a certain depth and does not penetrate through the output end cover is formed in the outer end face of the output end cover. An existing waterproof structure is only provided with a water baffle, the water baffle can only prevent cooling liquid from being directly sprayed into the interior, but it is impossible for part of liquid beads to be attached to the baffle and finally flow into a gearbox along gaps; the drainage groove is formed in the edge of the output end cover, an opening is formed in one side of the drainage groove, the opening is forme