The invention relates to a compact range device based on a microstrip patch reflective array. The compact range device mainly solves the problems that an existing reflective compact range device is high in cost and large in machining difficulty. The antenna comprises a feed source (1) and a microstrip patch reflective array antenna (2), the feed source adopts a horn antenna and is located above one side of an aperture of the microstrip patch reflective array antenna to emit spherical electromagnetic waves, the reflective array antenna converts the spherical electromagnetic waves into emergent plane waves, and a plane wave dead zone (3) is formed after the distance between the emergent direction and the aperture of the microstrip patch reflective array antenna is 6 times of the aperture of the microstrip patch reflective array antenna. The microstrip patch reflective array antenna comprises a dielectric plate (21), a metal reflective floor (22) and a plurality of reflective array units (23), the edge of the dielectric plate adopts a stepped structure, all the reflective array units are arranged on the surface of the dielectric plate according to a fixed period, the dielectric plate and the metal reflective floor are arranged in parallel up and down, and an air layer (24) is formed between the dielectric plate and the metal reflective floor. The device is small in size, light in weight, easy to install, low in manufacturing and maintenance cost and capable of being used for low-cost scenes.