The utility model discloses a portable automatic feeding car of tunnel shotcrete, characterized by constitutes at the initiative cylinder of railway carriage tail part delivery end, the driven roller who is located the carriage front end and closed conveyer belt of taking the initiative between cylinder and the driven roller by installing at carriage bottom position installation band conveyer, the initiative cylinder is by motor drive, concrete vibration blanking conveys the built -in to delivery end feeding shotcrete along with the conveyer belt in opening motor messenger carriage on the conveyer belt, set up the accelerator case in the top of railway carriage tail part delivery end, set up electronic atmospheric pressure check valve and accelerator vibrator in the accelerator pipe that is linked together with the accelerator case, open accelerator blanking in electronic atmospheric pressure check valve and the vibrator messenger accelerator case at the shotcrete built -in. The utility model discloses a concrete drier conveys with the automatic of accelerator, guarantees the quantitative ratio of concrete drier and accelerator to guarantee the engineering quality, improve the efficiency of construction, reduce intensity of labour.