In order to study the uniaxial tensile behavior of half grouted sleeve connection (HGSC) with axial eccentric rebar after fire, uniaxial static tensile tests were carried out on 48 HGSC specimens. The effects of rebar axis eccentricity and high temperature on the mechanical properties of post-fire HGSCs with different rebar diameters are studied, and the engineering opinions are given combined with the existing research. The results show that: post-fire HGSCs with rebar axis eccentricity mainly exhibit rebar fracture and rebar pullout failure. With the increase of the axial eccentricity ratio of rebar and the peak temperature，the transformation from rebar fracture to bonding failure is more likely to occur; Rebar axis eccentricity further affects the connection performance after high temperature. The force of HGSC with axial eccentric rebar decreases to 94% of that of the corresponding specimen without defect at most, and the slip increases to 173% at most; It is suggested that the influence of fire temperature and the axial eccentricity ratio of rebar should be considered in the design, construction, post-fire performance evaluation and repair of HGSC and PC structure with this connection. It is required that there is no rebar pullout failure and obvious bondslip between rebar and grout. Welding can effectively solve the problem of poor thread processing quality.