The invention discloses an anti-diffusion tunnel surrounding rock blasting hole slag removal device, and relates to the technical field of tunnel construction. The anti-diffusion tunnel surrounding rock blasting hole slag removal device comprises a box body; first ball bearings are fixedly connected into the left side and the right side of the box body; a first rotary shaft is fixedly connected tothe inner walls of the first ball bearings, and the right side of the surface of the first rotary shaft is fixedly connected with fan blades; and a first conical fluted disc is fixedly connected to the position, located on the left sides of the fan blades, of the surface of the first rotary shaft. According to the anti-diffusion tunnel surrounding rock blasting hole slag removal device, negativepressure forms in the box body through rotation of the fan blades, waste slag removed from blasting holes is collected into the box body through a first pipeline and prevented from being diffused intothe other blasting holes, and accordingly, the problems that a slag removal device on the market at present cannot collect waste slag removed from blasting holes, the waste slag removed from the blasting holes are prone to being diffused into the cleaned blasting holes, and then, the blasting holes are not thoroughly cleaned are effectively solved.