The invention discloses a tunnel stability measuring and evaluating vehicle which comprises a vehicle body and an improved single-body pillar fixed on the vehicle body in a detachable way. The vehicle body comprises a compartment plate (1), the improved single-body pillar is fixed on the compartment plate (1) in the detachable way, a displacement metering system, a hydraulic metering system, an anchoring force test system (22), an operation machine (2) and a storing box (3) are arranged on the compartment plate (1), and the improved single-body pillar is connected with the displacement metering system and the hydraulic metering system. According to the tunnel stability measuring and evaluating vehicle, liquid is injected in a circulated way, and existing emulsion is used to serve the whole liquid injection process; and the improved single-body pillar of the tunnel stability measuring and evaluating vehicle can ensure that a single body needs not to be carried by workers in a working distance of thousands of meters, and the workload and work intensity are reduced greatly.