The invention relates to efficient imbibition nonflowback fracturing fluid of a dense oil reservoir and an imbibition swallowing-spitting oil production method thereof. The efficient imbibition nonflowback fracturing fluid is prepared from a base solution and a cross-linking solution of which a cross-linking ratio is (90 to 110):10, wherein the base solution is prepared from a thickening agent, apermeation enhancer, a clay stabilizer, a bactericide, a PH (Potential of Hydrogen) regulator and water; the cross-linking solution is prepared from a cross-linking agent, a gel breaker, a degradationagent and water. A fracturing fluid system has the advantages that gel breaking is complete, residue can be sufficiently degraded, the content of the residue after degrading for 10 hours is smaller than 180mg/L, the degradation rate is 70 percent, an imbibition effect is good, and the imbibition recovery efficiency of rock cores at different imbibition rates can be improved by 5 percent or above;imbibition swallowing-spitting oil production can be carried out by combining a corresponding using method, and the yield of crude oil can be effectively increased; by five months of current cumulative production and compared with direct flowback wells which are put into production at the same term, oil production per well is increased by about 2t/d.