The invention provides a biodegradable textile fiber adhesive-bonded fabric to prevent adhesion after the operation and its preparing method, which belongs to the domain of medical article, and relates to the preparation of a nanometre-sized fiber adhesive-bonded fabric and the application as the anti-block film after the operation. The said adhesive-bonded fabric is prepared by adopting electrostatic spinning method, which includes preparing spin dope, dissolving the aliphatic polyester in the flux and mixing intimately to prepare the aliphatic polyester spin dope. The used flux of the spin dope can be one or compound system of two of carrene, chloroform, acetone, acetylene tetrachloride,acetic acid dimethylamide. Secondarily on the electrostatic spinning machine, by filling spin dope, electrostatic spinning and collecting superfine fibre, the aliphatic polyester superfine fibre is prepared, which carries out the adhesive-bonded fabric of electronic spinning nanometre-grade fiber and which can be used as blocking agent after the operation by the decontamination and biocidal treatment. The cloth has good flexibility and toughness, which can overcome the defect of anti-block film reported in the past. Because the degradable materials are selected, the adhesive-bonded fabric begins to degrade after about one month and completely degrade finally, which comes up to the anti-block function.