Engineering vehicle auxiliary frame mounting structure and foam fire truck

The utility model provides an auxiliary frame mounting structure of an engineering vehicle and a foam fire truck. The auxiliary frame mounting structure of the engineering vehicle comprises a controlgroove and a water tank, wherein sliding plates are connected to the two sides in the control groove in a sliding manner; and the bottoms of the two electric telescopic rods are arranged in the control groove. The sprayer installed on the auxiliary frame of the engineering vehicle can be conveniently and rapidly taken by a user for spraying water, use of fire extinguishment is not delayed, the fire extinguishment use time is shortened, when the vehicle can be close to a fire point, the sprayer does not need to be held manually, the sprayer is directly placed in the clamping component for a large amount of water spraying, and the engineering vehicle is convenient to use. The fire extinguishing device is simple in structure and convenient to use, brings great convenience to fire extinguishing of users, relieves fire