The invention discloses an awning device with adjustable height. The awning device comprises an upper substrate, a lower substrate and an awning which is fixedly arranged at the top of the upper substrate, a sunshade curtain extending downwards winds around the periphery of the bottom end face of the awning, a first cavity extending downwards is formed in the upper substrate, the middle of the top of the interior of the first cavity is provided with a first sleeve extending downwards, a first inner spiral-pattern cavity is arranged in the first sleeve, the lower substrate is composed of a second sleeve which extends upwards and enters the first cavity and a base which is arranged at the bottom of the second sleeve, first sliding connection grooves are correspondingly formed in the outer walls of the left and right sides of the second sleeve, a second cavity for being in matched connection with the first sleeve in a sliding mode is formed in the second sleeve, and the bottoms of the inner walls of the two sides of the first inner cavity are correspondingly provided with position guiding blocks which enter the first sliding connection grooves and are in matched connection with the first sliding connection grooves in a sliding mode. The awning device with the adjustable height is simple in structure and convenient to operate and install, and lifting can be automatically controlled, supporting is firm, and the safety during usage is improved.