Indoor toxic gas automatic detection and purification ventilation device

The invention discloses an indoor toxic gas automatic detection and purification ventilation device which comprises a detection trolley, a connecting frame is slidably connected to the top of the detection trolley, and a plurality of first electric hydraulic rods are fixedly installed at the top end of the connecting frame. According to the scheme, the arranged detection trolley can carry out continuous automatic detection within the whole indoor range along with the track, and when toxic gas and the diffusion source position of the toxic gas are detected, the detection trolley can be moved to the indoor ground or is driven by a first electric hydraulic rod to move to a certain source position of a wall; therefore, the folding soft cover is unfolded in the detection trolley to get close to the poisonous gas, gas generated by the poisonous gas is extracted and purified outwards more efficiently, diffusion of the poisonous gas source position in the purification process of the device is reduced, and then the pu