At present, the railway mechanical refrigerated cars in use are mainly in groups, including B2. The model is composed of 9 vehicles and 1 group (8 loading trucks), and the others are composed of 5 vehicles and 1 group (4 loading trucks). With the changes in the transportation market of perishable goods, the supply of bulk goods has decreased, the use of mechanically cooled vehicles has been restricted, and the efficiency of vehicle use has declined significantly. Although the ice truck is single and flexible, it needs to be iced halfway due to the technical conditions of the body. Every time the ice truck is iced, it needs to stay at the station where the ice station is located for more than 12 hours, and the delivery period is increased by 1 day. This will inevitably reduce the speed of goods delivery, which does not meet the timeliness requirements of perishable goods.

The number of railway refrigerated cars has increased by nearly 3000 since 1991 to 1998, but the refrigerated transport volume has been hovering around more than 2 million tons. As there are not enough ice adding outlets along the whole road, especially the ice making and adding capacity of the main line ice adding stations in Beijing Guangzhou, Beijing Shanghai, Longhai, Zhejiang and Jiangxi can not meet the transportation demand of ice cold vehicles, so there are more parking and loading restrictions for ice cold vehicles in the hot season every year, so that the few refrigerated vehicles can not be fully utilized. In addition, the overall carrying capacity of the railway, especially the limited port capacity, is insufficient, which often results in goods and vehicles but no destination, or the railway has not yet solved the equipment and facilities for the departure, transit, and reception of refrigerated containers, as well as the midway power supply problem of transportation, so that refrigerated containers, a good means of transportation of perishable goods, cannot play a role in railway refrigerated transportation, It also affects the receiving of international refrigerated transport containers.

There are nearly 8000 refrigerated vehicles in the whole road, of which 2292 are allocated to 5 machine maintenance sections, and the special dispatching system is responsible for dispatching and commanding. In 1998, the average loading time of each vehicle was 11.6 times (20 times in historical years is the best), and the turnover time was about 31.5 days. At the same time, there is no special station management for more than 5000 cold cars, so the car condition is poor and the utilization rate is low.