The invention belongs to the coal mine roadway rock and soil reinforcement field and discloses an anti-collapse hole drill bit for the coal mine roadway rock and soil reinforcement. The anti-collapse hole drill bit comprises a front drill bit and a rear drill bit which are arranged coaxially; the front drill bit and the rear drill bit are arranged back to back; the diameter of the rear drill bit is smaller than that of the front drill bit; a drill pipe installation hole is formed in the rear drill bit; the drill pipe installation hole and the rear drill bit are arranged coaxially. According to the anti-collapse hole drill bit for the coal mine roadway rock and soil reinforcement, the tail portion of the front drill bit is connected with the rear drill bit which is opposite to the front drill bit to enable the coal and rock mass after the hole collapse during pipe withdrawing can be removed through the rear drill bit so as to enable the drill bit and the drill pipe to withdraw and the diameter of the rear drill bit is smaller than that of the front drill bit and accordingly the rock and soil drilled through the front drill bit can be smoothly discharged conveniently.