The invention discloses an inspection robot which comprises two inspection robot bodies. Each inspection robot body comprises a walking wheel set mechanism, a clamping mechanism and a pitch change mechanism. Each pitch change mechanism comprises a base, a slide base arranged on the base, a screw rod arranged on the base, a nut matched with the screw rod in a threaded mode and connected with the slide base and a pitch change drive device arranged on the base. Each clamping mechanism comprises a supporting box arranged on the corresponding base, a supporting frame arranged on the supporting box, a first rotary shaft, a second rotary shaft, a clamping drive device, a first clamping jaw and a second clamping jaw, wherein each first rotary shaft and each corresponding second rotary shaft are arranged on the corresponding supporting frame and are connected through a transmission mechanism, each clamping drive device drives one of the corresponding first rotary shaft and the corresponding second rotary shaft to rotate, each first clamping jaw is fixed to the corresponding first rotary shaft, each second clamping jaw is fixed to the corresponding second rotary shaft, and the first clamping jaws and the second clamping jaws can be hung on a line after being crossed and can be disengaged from the line after being separated. The inspection robot can achieve the effect of crossing over a barrier through motions of the pitch change mechanisms.