A saddle-shaped pulley special for laying cables in a well comprises a pulley block and a support which are connected, and the pulley block is of an arc-shaped structure and is composed of arc-shapedpulley frames parallel to each other and pulleys arranged in the arc-shaped pulley frames in a sliding mode. The support is formed by sequentially connecting an adjustable well edge fixing support, asupport adjusting sleeve and a well edge fixing clamp. The pulley is manufactured according to the structure of the cable and the cable well, the pulley block is arc-shaped, the stress characteristicof the cable is met, the friction force is reduced during laying, the manufacturing cost is low, the operation is simple, the use is convenient, the cable is prevented from being damaged during underground laying, manpower is saved, and the working efficiency of underground cable laying can be effectively improved.