“Hague rules” is about the rules of bill of lading but actually governs the contract of carriage which must use the Bill of Lading. The B/L under these rules means the written contract of carriage with part or special states required. The written form is necessary for the contract of carriage. “Hague rules”does not distinguish the contract of carriage from the B/Las shipping document. This article comments the consistence of both above from the view of transportation， and puts forward its opinions from the view of trade on the issues such as the allowance of pledge for the B/L as trading document， the mixing of B/L and sea waybill in UCP， serving the trade but as a burden for the carrier by the B/ L，two modes of transferring of B/L，the necessity that the seller directly procures the B/L under FOB. In addition， these questions are mentioned: why is not the holder of B/L entitled to claim on the transferor and why are the Rights to the carrier in accordance with contract of carriage which is not entered into with the holder of B/L？ Finally，this article discusses the dif ferences between B/L as trading document and contract of carriage.