The invention relates to a double-side technological cotton suction device of a ring spinning frame. The double-side technological cotton suction device comprises a tail cotton suction air box, a tailair pipe, a tail cotton suction fan, a head cotton suction air box, a head air pipe, a head cotton suction fan, a first middle air pipe and a second middle air pipe. The head cotton suction air box is connected with the first middle air pipe by the head air pipe, the tail cotton suction air box is connected with the second middle air pipe by the tail air pipe, the first middle air pipe and the second middle air pipe are connected with each other and are closed, and the head cotton suction fan and the tail cotton suction fan are arranged in the head cotton suction air box and the tail cotton suction air box. The double-side technological cotton suction device has the advantages that one-way technological cotton suction of a long vehicle is transformed into technological cotton suction of two short vehicles, the original long air pipes are changed into the two short air pipes under the condition that the cross sections of the middle air pipes are guaranteed against being changed, the air pipes are shortened, the total quantity of airflow in the air pipes can be reduced, the flow rate can be lowered, negative pressure loss can be reduced, the consistency of the internal negative pressures of the air pipes can be enhanced, the negative pressure balance can be effectively improved, and cotton suction negative pressure requirements of broken ends of yarns can be assuredly met.