The invention relates to a hanging and washing device for a field biological membrane collector, which is composed of a collecting vehicle and a washing device. The collecting vehicle is composed of a hook (1), a buoy (2), a roller (3), a water-proof line (4), a telescopic arm (5), a wire winding shaft (6), a handle (7), a support frame (8), a rotating shaft (9), a blind bolt (10), a location circular disc (11), a chassis truck (12) and a horizontal adjusting lead screw (13). The washing device is composed of an ultrasonic cleaning instrument (14), a switch (15), a water pump (16), a water discharging pipe (17) and a chassis (18). The cleaning instrument and the water pump are fixed on the chassis through screws, and then the whole device is fixed on the collecting vehicle. The hanging and washing device for the field biological membrane collector is mainly used for hanging the field biological membrane collector and achieving field washing of a biological membrane, and can be widely applied to different valleys to obtain biological membranes with high quality and perform ecological monitoring. Compared with the prior art, the hanging and washing device for the field biological membrane collector can accurately collect biological membranes of different water depth and finish washing in the field, enables the collector to be hung and taken easily, can adjust the distance between the collector and a bank, ensures that a sampling device is horizontal under complex landform conditions, and is convenient to move.