As the economic situation and financial policies change, a new form of guarantee—— “Trading-based Guarantee Contract” has emerged. However, the only legal provision that directly regulate this new type of guarantee is only the Article 24 from the regulations on private lending, issued by Supreme People's Court, which does not clearly stipulate the nature and effectiveness of the Trading-based Guarantee Contract. The academic and practical circles are still discussing related issues, and they have not yet been formed unified opinion. However, in social practice, there are numerous and complicated disputes over the Trading-based Guarantee Contract, which must be regulated by a unified theoretical viewpoint. The "Civil Code" has made major adjustments to the security rights system, acknowledging the effectiveness of atypical security contracts, and excluding fluidity contracts from the prohibitive regulations, undoubtedly leaving room for interpretation of sales-type security contracts. Although there had been discussions on the Trading-based Guarantee Contract before the promulgation of the Civil Code, some commentators suggested that atypical guarantee methods such as assignment guarantees should be included in the Code, but it have not been realized. After the promulgation of the Civil Code, it is undoubtedly meaningful to re-study the Trading-based Guarantee Contract under the scope of the new rules of the Civil Code, and it is undoubtedly meaningful to determine its positioning and effectiveness under the existing legal framework. It is necessary to study consensus basis from the expression of the rational parties to determine the nature of the Trading-based Guarantee Contract. From the perspective of a rational commercial subject, it is deemed that there are many unreasonable points in the agreement of the trading consensus, and the content of the contract does not conform to the other characteristics of the normal sales contract. The theory of settlement consensus has its rationality in the interpretation, though the settlement system has not been included in the Civil Code, cannot meet the needs of solving practical problems. To determine the consensus basis of the type of contract as the guarantee consensus, which is the most reasonable interpretation, not only reflects the true intentions of the parties, but also can be linked to the current legislation of atypical security right system and judicial practice. To confirm the effectiveness of the Trading-based Guarantee Contract, it is necessary to analysis the effect of obligation and real right from the two perspectives of the sales contract and the guarantee behavior. Under the premise of affirming the validity of the contract, the validity of real right needs to distinguish between many situations in practice. The Trading-based Guarantee Contract with publicity conditions should be treated as atypical security right, and the priority of compensation could on quasi-application of the provisions of security right from the Civil Code. Trading-based Guarantee Contract that do not meet the requirements for publicity should not recognize the validity of real right, but only recognize the vadility of the obligation right.